> The same way we ban heroine. Or murder
Our attempt to ban heroin (war on drugs) has been a massive failure[1] only replaced/made worse by prescription opioids[2]. Not a good example.
Murder is not something that really needs "banning" to stop the vast majority of people from committing it. The amount of people willing to use crypto is not comparable to the amount of people willing to murder (illegal or not). Not a good example.
If you want a semi-comparable example, take the attempt to make torrenting/pirating illegal. Look how that turned out.
> We just make trading cryptocurrencies illegal and prosecute people who are found doing it
Good luck with that. No other country has made much of an impact and it would require an enormous amount of resources to persecute ordinary people.
> no sane company would touch it with a ten-foot pole
> if the victims don't have a legal way of exchanging legal tender for bitcoin
There will always be another country willing to host exchanges. VPN's exist. You will never get all governments to ban crypto. Again, you are just listing ideas that have been tried and failed.
> but also illegal usage.
You think making crypto illegal... would stop people already using it for illegal reasons? They would be ok with one illegal act, but not another less valid one?
1. https://www.samhsa.gov/data//sites/default/files/report_1943...
2. https://www.drugabuse.gov/publications/research-reports/pres...