Indeed nothing lasts forever but I do not think that Bitcoin will be ending anytime soon. If the beginning of government's interest to create, navigate and circulate a centralized digital currency would be the end of Bitcoin, I don't think that it is happening soon. Every nation has a different government system, capacity to fund resources and technological advancements. On the contrary, the government of some countries has been very open with cyrptocurrencies that they tolerated different establishments to engage with transactions using Bitcoin. Also, I think that even if the government would start circulating their own digital currency to compete with Bitcoin, they would still choose the latter because of its features that they were enticed with foremost as to why they engage with cryptocurrencies.