Why are you even thinking about those things? bitcoin is already applied to many services, merchants, stores and other stuffs that we can use and exchange together with real products. It's not really a problem if you ever think about what you have said.
There's already a true use case for bitcoin and the gov't is even the one that wants to integrate with it. Bitcoin isn't even forcing itself to get attached with gov'ts but the gov'ts are the ones that are pushing themselves to it, why? because bitcoin is usable and has a large market cap that they can take advantage.
Indeed, that's agreeable mate and when government has been successfully engage cryptocurrency to their system they'll fully can control it. I think that's our biggest problem in the future when that happens, which isn't good for us who holds crypto. There will be a possible crash of price, due to more holder cannot withstand against such regulations imposted by government leaders. I can't say it in general but there might be possibilities, some leaders will be greed enough to make the situation be overpowered by them. Our financial freedom will not be as free as what we're experiencing today, and certain circumstances might arise if crypto becomes controllable by government authorities.