I want to answer your first question.
Cryptocurrency has already creat d a new financial system already. Removing anything like middle man and you just sending and receiving crypto.
As of now any sanction on cryptocurrency is just waste of time. If it becomes stricter, people will move to self custody walker, decentralised exchanges or simple peer to peer transaction were those strict regulations have no effect on them.
And moreover those sanctions are on institutions and Bitcoin is a protocol. Way more harder to put strict regulations on it.
You can't sanction what you can't control. The US has only been able to sanction, freeze, and even confiscate BTC sitting in custodial wallets (like CEXs).
But non-custodial wallets? Never. Perhaps, Russia, China, and Iran are taking advantage of the situation. They'll ditch the USD and adopt decentralized cryptocurrencies. It may be already too late.