One of the concerns I have is that they could take down the electrical grid or internet as a plan to bring in the global reset, etc.  If that happens, having Bitcoin or other cryptocurrencies might lose their usefulness at least temporarily.

This idea might be out there already but is it possible to write apps that enable cell phones to directly connect to each other, forming a network off grid?  Sort of an wireless Internet outside corporate and government control.

This might have been answered elsewhere but couldn't find it, if it has.

The miners get paid less and less as time goes on. 
With the ledger also growing bigger and bigger, wouldn't the cost of mining start to exceed the profitability of mining?  If no one would mine bitcoins anymore, wouldn't it shut the whole system down?

Can some of the bright minds who brought us the cryptocurrency start another revolution?  I'm all for curbing hate speech but they are now starting to censor narratives that don't fit their social and political agendas, and stifle free speech.  Can we design a P2P social media that they can't control and they can't shut down?