Perhaps you should check out the Cantillion effect, and research fractional reserve banking. Both are clear financial systems that greatly benefit the extremely rich.
Is the point you are trying to make that neither of those apply to cryotocurrencies? Because that is not true as the history of hard fork and failed exchanges demonstrates.
Which hard forks have disadvantaged the poor? One that pops to mind is Ethereum's expensive staking requirement, but Bitcoin is apparently more in touch with the community.
Which exchange failures have disadvantaged the poor?
Well, the new change in ethereum fixed that "problem"