It's natural for some world-class investors, economists, governments and some large banks to criticize bitcoin, on the grounds of implementing the principle of prudence, maintaining business competition, risk control and consumer protection.
The prohibition's implemented to prevent crime, such as money laundering, funding of terrorism, and maintaining the sovereignty of conventional currency as a legal payment instrument in each country. I think these are just classic reasons, which characterize their incompetence in managing bitcoin technology as a new financial resource, whose positive benefits can be felt directly by citizens and their countries.