No government authority can stop cryptocurrency, the way cryptocurrency is structured the government can't stop people from going into it, however government lack of support and fight against cryptocurrency can slow the growth of it, there are some countries that still don't support cryptocurrency but people are still investing in it in that same country.
There's a country if your bank makes any transactions with crypto it will be ban and you will be reported to higher authorities and you will be detain prosecuted for involving your self in cryptocurrency but the people of that country has looked for a way not to be dictated when making any transactions from there banks to crypto or from crypto to there banks.
The government can't crack down cryptocurrency, crypto depends on there investors to grow, if the people are willing to support and invest in crypto then it will keep growing, the government can only make it difficult for people investing in cryptocurrency by not permitting Banks to allow people invest using the local bank.
But I don't see the reason why some government are fighting cryptocurrency, why not support it and then make a policy that the investor's will follow, cryptocurrency has helped in growing the world economy and can also help counties grow there economy if supported.