On my own opinion, i think the other government will not support cryptocurrencies because every country have their own currency and there's no law or policy about the use of these cryptos.
Right now we have information that many countries trying to bring their own cryptocurrency but its not easy for all as they have no relative technology and way for implementing this but few are trying to bring stablecoins or centralized coins for controling this all like China is also working on this but this all still long way to go on other hand no country want to allow their peoples to use this all as they cannot control this all and peoples will feel more freedom which is not good for any government.