You don`t need to think about it, miners have the biggest power when it comes to network decision making. We alone can`t do nothing, you need to contribute to network and only like that you have some vote. Cryptocurrencies are already regulated, that has been repeated here many times, you know total coins supply, you know the way of distribution, you know how you can use them, what governments can do is to regulate, or to try to regulate usage in their own countries, they can do that by controlling some services, but do you think they can control all of them? It`s decentralized network it will be hard for anyone to control it, but many will try, count on that.