if the government wants it then the government only needs to make a ban regarding the use of cryptocurrency in its country, that's over. without needing to destroy anything, it doesn't seem classy anyways. The decentralized network is seen as a threat because the government cannot fully control and supervise, while for those who aspire to freedom, decentralization is a solution.
But, I doubt any country gonna ban stablecoin in the long run, after all these stablecoin legally established and there's private company behind it who gets taxed by the government each year off their profit.
Maybe if government want to escalate into banning all crypto except the government's then it could happen.