the concern of crypto being used for tax evasion and illegal activities
If fiat not more used for tax evasion and illegal activities? It is.
the Bank of England governor recently said bitcoin has no value
It has no value but turned people that have just little amount of mney into millionaires and billionaires.
It's obvious that countries haven't considered bans in the past because they didn't consider bitcoin to be a threat
How is bitcoin a threat? Because fiat is more involved in illegal activities and more used by criminals.
Also even if it were not banned, governments can monitor all activity because basically everyone uses centralized exchanges and the blockchain is public
If people like they can, but privacy can still be maintained. But most people are ignorant of privacy.
So what would the future trajectory of the world look like after that?
Privacy coin, like Bitcoin is a privacy coin and I will only make mention of it because it is the true decentralized currency. It is deflationary and not centrally controlled. The future is just bright.