But how does bitcoin actually work?

7. jul. 2017
8 222 598 Ogledi

The math behind cryptocurrencies.
Enjoy these videos? Consider sharing one or two.
Supported by viewers: 3b1b.co/btc-thanks
This video was also funded with help from Protocol Labs: protocol.ai/join/
Some people have asked if this channel accepts contributions in cryptocurrency form. As a matter of fact, it does:
3b1b.co/crypto
2^256 video: slworlds.info/net/uWqwf852bZLYp7w/video
Music by Vincent Rubinetti: soundcloud.com/vincerubinetti/heartbeat
Here are a few other resources I'd recommend:
Original Bitcoin paper: bitcoin.org/bitcoin.pdf
Block explorer: blockexplorer.com/
Blog post by Michael Nielsen: goo.gl/BW1RV3
(This is particularly good for understanding the details of what transactions look like, which is something this video did not cover)
Video by CuriousInventor: slworlds.info/net/sqmfssiPe4DUkag/video
Video by Anders Brownworth: slworlds.info/net/xWKcaNCCspXPkps/video
Ethereum white paper: goo.gl/XXZddT
------------------
Animations largely made using manim, a scrappy open source python library. github.com/3b1b/manim
If you want to check it out, I feel compelled to warn you that it's not the most well-documented tool, and has many other quirks you might expect in a library someone wrote with only their own use in mind.
Music by Vincent Rubinetti.
Download the music on Bandcamp:
vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown
Stream the music on Spotify:
open.spotify.com/album/1dVyjwS8FBqXhRunaG5W5u
If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then "add subtitles/cc". I really appreciate those who do this, as it helps make the lessons accessible to more people.
------------------
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If you are new to this channel and want to see more, a good place to start is this playlist: 3b1b.co/recommended
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Komentarjev
  • If you see comments here about investing or brokers, they are scams. Videos about cryptocurrencies, evidently including ones that are just about the underlying technology/math, are hotbeds for attracting nefarious actors preying on the impressionable. Also, hi! If you’re new to this channel, most of it is about visualizing math. I get it, you probably landed here searching for how BTC works, not to spend your afternoon getting pulled into learning about, say, prime numbers or problem-solving, but if you have a moment take a look at the rest of the channel, you may enjoy what you find.

    3Blue1Brown3Blue1BrownPred 5 meseci
    • I reported every comment above this one. I encourage everyone to do the same. Very fucking annoying.

      John CavanaughJohn CavanaughPred dnevom
    • Great video for someone like myself that is new to the crypto world!

      Thomas NicholsonThomas NicholsonPred 2 dnevi
    • @tropickman yes, that's the 51% attack you may or may not have heard of.

      oH well,lord!oH well,lord!Pred 9 dnevi
    • BitTorrent surges 30% and reaches a new all-time high, achieving a market capitalization of $ 5 billion

      minecraftcrackminecraftcrackPred 10 dnevi
    • Dear Grant Sanderson, I've made translation of this video into russian back in 2017. Even graphic part is translated. Links to original are provided. And now you claiming youtube to delete my work because of copyright claims. What's wrong with you man?! I earned nothing from it just want to share it with russian speaking viewers. I spent my time and resources on absolutely volunteering basis and left link to original. What you doing now is simply rude and disrespectful. Discard your claim!

      ZzudwaZzudwaPred 11 dnevi
  • Hello everyone I'm new to bitcoin trade and I have watched a lot of videos along side tried some new strategies on my own but all to no avail. Can someone please recommend a trust worthy expert that can trade on my behalf and generate profit for me please

    Emmanuel GodsonEmmanuel GodsonPred 4 urami
    • Linda Worley: + 1. 6 . 0 .1. 9 . 8 . 7. 2 . 1. 2 . 6 W*H*A*T*S*A*P*P

      micheal dollinmicheal dollinPred 33 minutami
    • @bryan wayne She is an expert trader. And her trading services is reliable and transparent and apart from myself, I have never seen any of her customers complaining about loosing their money, and I have made a very huge profit under her management.

      micheal dollinmicheal dollinPred 33 minutami
    • Please who is this Mrs Linda trading services everyone is testifying about and how do I contact her directly?

      bryan waynebryan waynePred 42 minutami
    • @Orson Gilbert Investing with expert Mrs Linda has been one of the best steps I've ever taken in my life, as she made me recovered all I have lost while I was trading alone. may God bless her for me

      Robert DavidRobert DavidPred 48 minutami
    • I'm not here to converse for her but to testify just for what am sure of. I bet you she's trust worthy and your investment is safe and profit is guaranteed

      Stephanie KakaStephanie KakaPred 54 minutami
  • Anyone here from ATP?

    Richard WitherspoonRichard WitherspoonPred 8 urami
  • Sonunda biri nasil calistigini daha duzgun anlatmis.....

    Berk AyzekBerk AyzekPred 10 urami
  • The funny thing is: most people dont know how Gold is built up of protons and electrons and how it is created but everyone wants to understand Bitcoin :D

    BlackwingsssBlackwingsssPred 10 urami
  • So how do we cash in the coins??

    KUSHAL BISWASKUSHAL BISWASPred 15 urami
    • +==1==6==2==0==2==9==3==8==2==5==1

      MrGolds FXMrGolds FXPred uro
    • 𝑯𝒊𝒔 𝒂𝒗𝒂𝒊𝒍𝒂𝒃𝒊𝒍𝒊𝒕𝒚 𝒊𝒔 𝒐𝒏 ω𝒉𝒂𝒕𝒔𝒂𝒑𝒑

      MrGolds FXMrGolds FXPred uro
    • 𝑰𝒏𝒗𝒆𝒔𝒕 𝒊𝒏 ¢𝒓𝒚𝒑𝒕𝒐 𝒕𝒓𝒂𝒅𝒊𝒏𝒈 𝒘𝒊𝒕𝒉 𝒎𝒚 𝒂𝒅𝒎𝒊𝒏𝒊𝒔𝒕𝒓𝒂𝒕𝒊𝒗𝒆

      MrGolds FXMrGolds FXPred uro
    • Or sell it online. Any would do

      Richard HudsonRichard HudsonPred 10 urami
    • You can trade them for traditional government currency if that's what you're asking.

      plasticman2011plasticman2011Pred 12 urami
  • Thanks for the info.. I like the speakers voice ☺️

    Patricia [Trish Loftus] FevoldPatricia [Trish Loftus] FevoldPred 16 urami
  • I want 19:38 on a t-shirt

    Emmanuel GarciaEmmanuel GarciaPred 17 urami
  • 14:41

    Mauricio MonzonMauricio MonzonPred 18 urami
  • TAKE NOTE, APOLLO CURRENCY (APL) WILL DWARF ALL CRYPTOS!

    dean ivandean ivanPred 19 urami
  • This is so freaking cool. Awesome video

    Am_I_Human aka FindStoicismAm_I_Human aka FindStoicismPred 20 urami
  • I think the pandemic has taught people a big lesson, having one stream of income is not really a good idea cause your job doesn't secure your financial needs. The pandemic has really set out business-minded people from the rest that is why I'm so lucky to be among the investors trading with Mrs. Kamilah Thurston as his student it's been success and happiness since the beginning of my trades

    Marcus SconiersMarcus SconiersPred 21 uro
    • She turned me to a Boss .

      Clarlye SmithClarlye SmithPred 2 urami
    • Don't ever make the mistake of believing that market success has to come to you fast. Trade small, stay in the game, persist and eventually you'll reach a satisfying level of proficiency,Mrs. Kamilah Thurston always makes trading go perfectly good for me and am still trading with her.

      Clarlye SmithClarlye SmithPred 2 urami
    • Starting early is the best way of getting ahead to build wealth, investing remains a priority. The stock market has plenty of opportunities to earn a decent payouts, with the right skills and proper understanding of how the market works

      Donnie BleuDonnie BleuPred 2 urami
    • Speaking of Bitcoin trading, it's the best business in the world right now. I know a couple of friends who make a whole lot of money trading the financial market

      cheng hungcheng hungPred 2 urami
    • yeah thats true,You can only appreciate a person who tries to teach everyone how to invest and make profit on multiple ways.

      Franklin GushFranklin GushPred 3 urami
  • Pff screw that just buy and hodl

    Blu ScoutBlu ScoutPred dnevom
  • This video is very good. Please do a follow-up

    Lucas MLucas MPred dnevom
  • Quantum computers will be able to hack all of this one day.

    Derek SDerek SPred dnevom
    • Only the digital signature used (but the signature algorithm can be changed), not the mining.

      Theo PantamisTheo PantamisPred 11 urami
  • So every transaction needs a unique identifier in case there are other similar transactions and every transaction will also need a signature from the other person doing the trade. 2400 of these goes into 1 block That 1 block contains the hash of the previous block, I guess to form a line that's in order? And a proof of work so you only get 1 new block every 10 minutes. So the only real way to steal something is if you have someone else's private key, say they gave you all their bitcoin and sign it yourself then broadcast it 🤨

    Mashal9418Mashal9418Pred dnevom
    • That's why it's important to keep the private keys offline, such as on a hardware wallet.

      plasticman2011plasticman2011Pred 12 urami
  • It's a shame that something so mathematically appealing (bitcoin) attracts the most disgusting spam. Seriously? Let me read something of substance in the comments of this beautiful video. I can't believe SLworlds's spam filters don't detect this.

    John CavanaughJohn CavanaughPred dnevom
  • Really appreciate your work, this concept is difficult for me and i got only 50 percent ot it, please make another video with more simplification. also keep it around 15 mins ,20 max

    Saurabh NikhadeSaurabh NikhadePred dnevom
  • fools, i can use wolfram alpha to mine bitcoin instantly

    ChromaCat248ChromaCat248Pred dnevom
  • Investing successfully in forex requires the expertise of a professional broker that is why i have made profit since i started trading with Mrs Benjamin Addison she is the best.

    Geo VincentGeo VincentPred dnevom
    • since i started trading with mrs Benjamin Addison, i have maid good profit , her trading strategies are top notch coupled with the little commission she charges on her trade.

      Flecher EvelynFlecher EvelynPred dnevom
    • Amazing I also just started trading with Mrs Benjamin Addison, she is the best at what she does with an initial investment of $1400 i made up to $5230 in just a week of trading with her, her strategies are mind blowing

      felix bradfelix bradPred dnevom
    • ; I have traded with a lot of individuals but I have never come across anyone as good as Mrs Benjamin Addison, just by applying her strategies I now trade independently. she is the best I'd advise any novice in investing to trade with her.

      derick willsonderick willsonPred dnevom
    • As a first time investor I started trading with Mrs Benjamin Addison with just a thousand bucks. my portfolio is worth much more that now within just weeks of trading with her.

      Mark NwachukwuMark NwachukwuPred dnevom
    • @Investwithaddison

      Geo VincentGeo VincentPred dnevom
  • Haha I know a dude who had mined 60K and then his friend smashed his computer. So now his broke

    Kevin DudsonKevin DudsonPred dnevom
  • Really.. what a great video! I really appreciate your work sir! Thanks a lot!

    Dinesh PaskaranDinesh PaskaranPred dnevom
  • Bitcoin and Ethereum is the future, Investing in it now will be the wisest thing to do especially with the current rise

    Dr George MeldenDr George MeldenPred dnevom
    • @Mike Jones Investing Lol

      Let Me Talk 2 These Mufuckas UUUGGGHHH!!!Let Me Talk 2 These Mufuckas UUUGGGHHH!!!Pred 4 urami
    • Now, the only question is which goofy boomer Star Trek villain govt will be idiotic enough to impose heavy taxation/regulations on the one thing keeping their institutions financially solvent?

      Let Me Talk 2 These Mufuckas UUUGGGHHH!!!Let Me Talk 2 These Mufuckas UUUGGGHHH!!!Pred 4 urami
    • I will think about this, I really need to invest in crypto before it rises again...and I need another source of income currently

      Bouncing BubblesBouncing BubblesPred dnevom
    • I think the secret behind crypto is buying at a lesser very low rate and selling at a higher good rate

      Mike Jones InvestingMike Jones InvestingPred dnevom
    • Already working with Frederick second week was the only week I had issue, ever since then about six months of trading with it's been profitable and life changing

      Fleck StephanFleck StephanPred dnevom
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  • presumably your Private Key would be stored locally on your computer. So let’s say you have a compromised computer (as most are). If someone then steals your private key, can they not transfer all your money to some other account in one transaction? And that would be irreversible as it’s now fixed on the blockchain.

    AeroscienceAerosciencePred dnevom
    • @Aeroscience you can store the bitcoin private keys on a dedicated hardware wallets (no hacker through the internet can touch it) or generate the keys offline and then store them on paper.

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    • Or am I missing something here, I am new to this

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  • Hi, I need a bit of help here.... In 24:04, it was mentioned a successful miner can be incentivised to include a transaction in the block to be broadcast, with the payment of an optional fee. I am puzzled. Aren't ALL transactions supposed to be included in that Blockchain? Or do miners actually have the right to decide which transactions they wanna leave out and which ones they wanna be in the block? Thanks for any help out there...

    Ryan TanRyan TanPred 2 dnevi
    • @plasticman2011 Thanks for this reply. So ... it's the successful miner who decides what transactions he / she wants to include in the block. I had mistakenly thought otherwise.

      Ryan TanRyan TanPred dnevom
    • The miner will likely choose the highest fee paying transactions and fill the block with them. If a miner doesn't pick a certain transaction, then the next one probably will.

      plasticman2011plasticman2011Pred dnevom
    • +1 ( 8 6 0 ) 3 7 0 - 3 8 8 9

      Lorenzo SantosLorenzo SantosPred 2 dnevi
    • Reach out to my broker

      Lorenzo SantosLorenzo SantosPred 2 dnevi
  • So the moment someone breaks sha256 all cryptocurrency becomes worthless.

    Andras LibalAndras LibalPred 2 dnevi
    • That is the moment bitcoin upgrades to a new algorithm.

      plasticman2011plasticman2011Pred dnevom
    • No. If/when SHA256 breaks then the cryptocurrencies affected will just switch to a stronger hash function (SHA512, SHA-3, Skein...). The only real threat here is quantum computing, which may make possible brute force attacks that currently would take hundreds/thousands of years to complete with traditional algorithms.

      Javi LavandeiraJavi LavandeiraPred 2 dnevi
  • Very good explanation of the mechanics of the Bitcoin distributed ledger. Bitcoin works because it has value for crime. From tax avoidance to ransomware. Speculators arbitrage on that value. If governments crack down, it will lose that utility. Then bitcoin becomes a bunch of expensive NFT's.

    Bruce SoluskiBruce SoluskiPred 2 dnevi
  • Great vid! However, I now know even less than I did before! :-)

    EO RhinoEO RhinoPred 2 dnevi
  • Still this confuses the hell out of me...

    Jeews SamJeews SamPred 2 dnevi
    • Buy and hold... Buy and trade. Easy Peasy

      alex xanderalex xanderPred 2 dnevi
  • Basically it's all a GRAND BS

    Corpse AwarenessCorpse AwarenessPred 3 dnevi
  • What if my bitcoin transaction ends up in a "loser" block chain? Is the transaction cancelled?

    5astelija5astelijaPred 3 dnevi
    • that transaction will be broadcasted to all block chains, so it will probably be fine

      Usual Unusual KidUsual Unusual KidPred 2 dnevi
    • Mostly yes, exceptions : Bitcoin cash

      rohan krohan kPred 3 dnevi
  • Excellent Video, this video setup is really very understandable

    Isabella MasonIsabella MasonPred 3 dnevi
  • Isn't adding money out of thin air kind of uneconomic?

    Vavelntin HaraklanyiVavelntin HaraklanyiPred 3 dnevi
    • The big banks do that all time. It is not unethical if they do so to make the economy stronger for controlling inflation etc

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  • Heisenberg, Schrodinger and Ohm are in a car They get pulled over. Heisenberg is driving and the cop asks him "Do you know how fast you were going?" "No, but I know exactly where I am" Heisenberg replies. The cop says "You were doing 55 in a 35." Heisenberg throws up his hands and shouts "Great! Now I'm lost!" The cop thinks this is suspicious and orders him to pop open the trunk. He checks it out and says "Do you know you have a dead cat back here?" "We do now, asshole!" shouts Schrodinger. The cop moves to arrest them. Ohm resists.

    Harry YHarry YPred 4 dnevi
    • This joke is sincerely good! Thank you for sharing it.

      Lucas Moreira SantosLucas Moreira SantosPred 11 urami
    • Upvoted because it was written by a human.

      John CavanaughJohn CavanaughPred dnevom
    • Thats very good

      Malcolm GardnerMalcolm GardnerPred dnevom
    • Underrated

      Valerio MomiglianoValerio MomiglianoPred 3 dnevi
    • underrated

      E RE RPred 3 dnevi
  • Crypto guidance And recovery of lost funds W-H-A-T-Å-P-P 1 °7 °3 °7 °2 °5 °7 °9 °6 °5 °3

    Hardc0re crypt0Hardc0re crypt0Pred 4 dnevi
  • This is a great video. I mostly understand it, but only because my son describe the hashing function that he was working on which ends up being a significant part of the crypto protocol

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  • *No one does it better than lucidcracks on !!G He never fâils mê*

    Testimony MathewTestimony MathewPred 4 dnevi
  • Wow, as a programmer and techie; this is the best video i've seen on blockchain. Thanks

    Brian GochnauerBrian GochnauerPred 4 dnevi
  • Very good technical explanation. But economics is another subject : why is the value so high and increasing ? Just because people all agree for BTC value to increase. BTC value is just set by humans themselves. Money and currency theory are interesting too.

    Mathieu CeniniMathieu CeniniPred 4 dnevi
  • U need to teach me math this way. . .. . ty for value u share

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