These threats you've mentioned are a huge concern to many. But developers already have a solution to this problem. The real threat to Bitcoin right now would be Quantum Computing. Governments "attacking" Bitcoin at the core level would be almost impossible due to the amount of resources needed. It would require hefty sums of money to acquire 51% of the network hashrate to effectively "disrupt" (double-spend) the Bitcoin blockchain. There's another way governments can "attack" Bitcoin and that's by closing all Fiat on/off ramps. In other words, making Bitcoin "illegal" where no one would be able to buy/sell with ease. That would plunge market prices all the way down the drain, since VCs and institutional investors are what keeps demand high.

At this point, I don't think there are any intentions from the government to "attack" Bitcoin. In fact, most governments like Bitcoin because of the huge taxation benefits it provides. With mainstream media labeling Bitcoin as the "next digital Gold", things will only get better in the long run. Price-wise, of course. Hopefully, Bitcoin will be able to remain decentralized forever. Just my opinion