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A systematic critique of Bitcoin's value proposition

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Re: A systematic critique of Bitcoin's value proposition

#41
post #21

Something I've always considered a curious decision about Bitcoin is the decision for halvings to occur as discrete events rather than as an exponential decay occurring on each block. Having them be discrete events is probably easier for someone to verify by eyeball, I guess, but it has the disadvantage that it creates moments in time where some large portion of the hardware in the market can suddenly no longer mine…

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Re: A systematic critique of Bitcoin's value proposition

#42
post #21

Something I've always considered a curious decision about Bitcoin is the decision for halvings to occur as discrete events rather than as an exponential decay occurring on each block. Having them be discrete events is probably easier for someone to verify by eyeball, I guess, but it has the disadvantage that it creates moments in time where some large portion of the hardware in the market can suddenly no longer mine…

This is the only argument I have found against Bitcoin that have substance. I can see this as a problem, but so far there have always been enough miners that was profitable. One day that might not be true though - hopefully it wont.

One reason for the halving cycle could be the way it kinda shocks the price and that makes people speculate and talk about Bitcoin like crazy. This is the perfect way to have a wrecking ball breaking the old broken system. Or it might just have been easier to implement.

Re: A systematic critique of Bitcoin's value proposition

#43

> In private discussions I have heard three counter-arguments, none of which I accept I think this article skips the most compelling (to me) counter argument. If there’s a 51% attack, the currency loses all value. Nobody will want to trade Bitcoin or use it as a currency once this attack is exploited. So a 51% attacker is disincentivized to perform said attack because doing so would make the prize lose its value. Now…

> I suppose if your worry is a government trying to destroy Bitcoin, then that’s exactly how to do it…

Andreas Antonopoulos - 51% Bitcoin Attack

https://www.youtube.com/watch?v=ncPyMUfNyVM

Re: A systematic critique of Bitcoin's value proposition

#44

> In private discussions I have heard three counter-arguments, none of which I accept I think this article skips the most compelling (to me) counter argument. If there’s a 51% attack, the currency loses all value. Nobody will want to trade Bitcoin or use it as a currency once this attack is exploited. So a 51% attacker is disincentivized to perform said attack because doing so would make the prize lose its value. Now…

A 51% doesn't get you coins, it lets you spend coins twice. Imagine: 1) borrow a bunch of BTC, 2) use it to buy stuff you want, 3) 51% attack to fork the chain and reverse your spend, 4) pay back the borrowed BTC What does it matter if the price of BTC falls through the floor afterward? Of course depending on what you buy, what your lender knows and cares about, and more, you might still face repercussions that make…

You can already spend coins twice, it's just that one of the addresses you send the coins to ultimately won't get them. So people have to wait some time to ensure the transaction fully processes before they can give you the goods in full confidence that they have received payment.

At some point, if cryptocurrencies become more established, it might be financially beneficial for one blockchain if another blockchain becomes non-viable.

Re: A systematic critique of Bitcoin's value proposition

#45
The consequences of a 51% attack are greatly overstated. A 51% attacker can prevent new transactions from confirming, and roll back recent transactions. They can't roll back transactions that happened (roughly) longer ago than the sustained duration of the attack. They can't mint extra coins, or double-spend arbitrarily old transactions. Under 51% conditions, you need to be more careful about accepting recently-confirmed payments, similar to 1 sat/vB transactions in a full mempool today. You can still transact, you just need to be patient and careful. The value will drop, yes, but it won't go to zero unless the attacker is able to sustain the attack indefinitely.

Re: A systematic critique of Bitcoin's value proposition

#46
post #21

Something I've always considered a curious decision about Bitcoin is the decision for halvings to occur as discrete events rather than as an exponential decay occurring on each block. Having them be discrete events is probably easier for someone to verify by eyeball, I guess, but it has the disadvantage that it creates moments in time where some large portion of the hardware in the market can suddenly no longer mine…

Can you demonstrate this at all? Bitcoin has been mined for over a decade and never came even close. When miners drop off, mining difficulty decreases.

If you're talking about a nuclear war scenario, we will have much bigger problems than bitcoin mining being slow.

Re: A systematic critique of Bitcoin's value proposition

#47

Aside from Satoshi's hoard.. there's also just regular destruction. Units can be mined and then permanently lost. The system has a limited number of units that can be generated in total and no mechanism to replace the lost units. Why is this not a long term problem for bitcoin?

1. As other people mention Bitcoin is highly divisible. 2. Other Bitcoins simply becomes more valuable and thus strengthening the system

Re: A systematic critique of Bitcoin's value proposition

#48

> In the third section I analyze its security model, specifically the cost of mounting a 51% attack on the assumption that hash power is available for rent and doesn't need to be purchased by the attacker. Bitcoin mining requires special devices (ASICs). These ASICs would lose their value if Bitcoin lost its value. Given this fact, why would anyone rent them out, or rent out the hash power?

>> Bitcoin mining requires special devices (ASICs) Nitpick: Any computer can mine bitcoin. Economic bitcoin mining requires special devices.

My favorite way to mine bitcoin!

https://www.righto.com/2014/09/mining-bitcoin-with-pencil-an...

Re: A systematic critique of Bitcoin's value proposition

#49

> In private discussions I have heard three counter-arguments, none of which I accept I think this article skips the most compelling (to me) counter argument. If there’s a 51% attack, the currency loses all value. Nobody will want to trade Bitcoin or use it as a currency once this attack is exploited. So a 51% attacker is disincentivized to perform said attack because doing so would make the prize lose its value. Now…

I think this is not a realistic worry for potential attackers. If someone gets control of 51%, there will be a lag time for when people start to truly believe that the currency lost its value. So there will definitely be a huge value gain for any attackers that manage to pull this off.

Re: A systematic critique of Bitcoin's value proposition

#50

Earlier quoted context omitted.

A 51% doesn't get you coins, it lets you spend coins twice. Imagine: 1) borrow a bunch of BTC, 2) use it to buy stuff you want, 3) 51% attack to fork the chain and reverse your spend, 4) pay back the borrowed BTC What does it matter if the price of BTC falls through the floor afterward? Of course depending on what you buy, what your lender knows and cares about, and more, you might still face repercussions that make…

Okay sure. At best you can do that once, ever. So you’d better buy something worthwhile.

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