Bitcoin and Cryptocurrency are growing, but they are backed up by terrorist and illegal groups. Governments are worried that this will make the groups challenging to control and that the use of Bitcoin as a form of payment has made everything out of control. That's why Bitcoin is banned continuously from swimming.
Your opinion is not entirely true, because bitcoin is not supported by anyone including terrorists or illegal business players. Bitcoin really grew because of the trust of bitcoin users and the need for digital currencies, in line with the increasingly advanced era, which is all digital. If a country's government prohibits the use of bitcoin, because of security considerations and protecting its citizens from losses caused by high price fluctuations.