Oh sure. This can be done if practically all states decide on the prohibition of crypto currency under pain of criminal punishment and take appropriate measures to eliminate exchanges, exchangers, websites and everything related to the crypto currency. Under such conditions, the Crypto currency is unlikely to exist, and if it does exist, it will no longer have any significant impact.

Also, the crypto currency will cease to exist if people refuse to support it and will not show interest in buying it. Whether such options are possible in practice is another matter.