I think that there will not be any devastating disaster. They might try to test their power and influence but it doesn't mean they'll ruin the things if they are not 100% sure and even if they ruin, they'll be the only losers because Bitcoin is not the universal cryptocurrency, there are some other altcoins that can carry the weight that Bitcoin carries on their shoulders. For example, Monero. I bet this coin is going to become what people wanted Bitcoin to be.

To be honest, I think that the strategy of governments and financial institutes is to not destroy Bitcoin but to take it over. Imagine, the development of blockchain analysis companies will give them the possibility to track transactions easily. What's the next step? To push miners to accept regulations and confirm transactions according to the blockchain analysis firms, i.e. it will get censored and miners will reject transactions that BA companies don't want to be made. This will easily be possible, just build another hype about how Lazarus launders billions of dollars and how all the war and illegality is funded via Bitcoin, people will believe it and there won't be massive protest (but they'll happily use JP Morgan).

So, there is no necessity of disaster hard forks or something devastating. Just take it over, keep it in the corner like cat keeps mouse and that's all. They won't do anything dramatically terrible because there are billions of investments into Bitcoin, there is a huge sum of money made, they act very smart. They shout Massive Adoption, bring regulations and people are happy.