3 ms·

If a blockchain has a market cap of 1 billion USD, and uses proof of stake...then someone with <=500M of capital could mess with the chains data. It's already

• rcxdude 8y ago
  This is actually worse for proof-of-work chains, though. The cost of a 50% attack on most cryptocurrencies (including bitcoin!) is much less than half the market cap. The main thing which keeps such attacks from happening is that they are hard enough to profit from (it's quite hard to double-spend enough) while being expensive enough to that such an attack is a very risky and almost certainly unprofitable endeavour.
  • dnautics 8y ago
    Not only is it hard to double spend, but if your double spend is found, the liquidation value is likely to plummet from under you in or before the process of attempting to realize the theft.