https://www.schneier.com/blog/archives/2019/02/blockchain_and_.html
Отличная статья Брюса Шнайера о доверии к blockchain-ам, их реальной
пользе. Всё крутится вокруг доверия -- в данном случае вокруг доверия
к исходному коду.
Do you need a public blockchain? The answer is almost certainly no.
A blockchain probably doesn't solve the security problems you think
it solves. The security problems it solves are probably not the ones
you have. (Manipulating audit data is probably not your major
security risk.) A false trust in blockchain can itself be a security
risk. The inefficiencies, especially in scaling, are probably not
worth it. I have looked at many blockchain applications, and all of
them could achieve the same security properties without using a
blockchain -- of course, then they wouldn't have the cool name.
Honestly, cryptocurrencies are useless. They're only used by
speculators looking for quick riches, people who don't like
government-backed currencies, and criminals who want a black-market
way to exchange money.