in my opinion the only threat to bitcoin is only government. wayback 2017 bitcoin is so popular in media but not as a good example of financial asset but a threat to people a big scam or a bubble. government trying to destroy this kind of digital currency
Government isn't trying to destroy bitcoin. It's not illegal, the government did not rush out regulations. They were pretty slow to even start regulating bitcoin exchanges and other financial businesses, and really it's mostly been the states that have done this, not even the federal government has attempted to regulate bitcoin to this point. It's not credible to believe that government wants to destroy bitcoin, and they've made no attempts to do so.
The government has no rules about it. Even now the government has no authority in destroying bitcoin, what should it be because this world group of bitcoins cannot be destroyed with one government if it wants to.
In fact, I do not think that it is clear that the adoption will gradually occur because in the future this technology will definitely be used in world governments, so still bitcoin cannot be destroyed by any group of people, even I believe there is interference from government people in moving the price of bitcoin.
Definitely no governments with the ability to control the price of bitcoin just as there are no groups with the ability to control the price of bitcoin. The only thing that controls price are the market forces of how much is demanded and how much is available to buy.