I highly agree, altcoins that have an active developer have access on the code and they can do whatever they wanted and the government can pressure them to do what they wanted these developers to do. One good example is creating new coins and implementing a swap, and those who failed to swap will have their unswapped coins useless because the developer decided to. With Bitcoin, there may be hardforks but your Bitcoin is intact, and no need to move when hard fork happens.
Thanks for explaining that in details. But the importance of BTC is always a bad thing in government's eye. They know the benefits, but the only thing that's stopping them to legalize it is the fact that they can't control it. Well, there's nothing to worry about it. Bitcoin is a proof of work based coin. So as long as people have trust in it and keep using it, whatever the government do, it will still thrive.