> deplatformed from their banks

Cryptocurrency is not practical without access to a bank.

> inflation at all time highs

Cryptocurrency's extreme volatility means it's a poor hedge against inflation, especially compared to other assets that are known to be reliable without the volatility. For example, if you bought BTC a year ago hoping to hedge against the alarm bells that were sounding for inflation, you are now doing much worse compared to havin done absolutely nothing.

> dollar possibly losing de facto monopoly in world trade.

This is not a real use-case. Could this happen? Perhaps, but there's no reason to believe that this wouldn't decimate the cryptocurrency markets, if anything, the new reserve currency would be the more desirable asset, not cryptocurrency.