I can only see Bitcoin flexible enough in its BCH instance yet - PoW is there for good as well, open competition and external risks will ensure 'enough' decentralization for the very long run. No oligarchs that can stay on top forever as in PoS.

Fees are cheap and poor countries can have a nearly perfect scarce good for trading / economic / SoV (money) use - also extrapolated into long terms when
mass adoption brings down volatility.

Scaling of international applications will need to get now into big economic players (big miners / full mining node runners) i.o. to world wide adapt it  - or stay nichy / die.

Restricted smart contracts and on-chain ICOs will do the rest from 15th May on - so  ETH and others are done with that.

Guess that's it for now.