Have you seen the news lately? India's Supreme Court ruled that their central bank's ban on Bitcoin was unconstitutional, something similar happened in Israel recently, many countries are legalizing and regulating crypto. They are not afraid of it, they don't think it will replace fiat anytime soon, and maybe it will even be a net positive, because new markets mean more taxes.
And central bank coins still don't exist, all we have is just statements that they want to create such currency, but they were telling the same thing even before Bitcoin was created.
Yes, I'm aware. But even if countries have legalized Bitcoin, they could change their stance in the future. Once governments see Bitcoin heavily used by people in the mainstream world on top of Fiat, they'll try to limit its growth or ban its usage. Right now, they're accepting Bitcoin and crypto as legal tender for taxation purposes. After all, they don't want to miss the income opportunities this emerging Blockchain industry provides. Believe me that once governments start rolling in their own digital currencies to everyday people, they might prevent anyone from using an alternative monetary system for their own benefit. This will take part especially in communist/socialist countries like Venezuela and China. Developed countries like the US and UK might still allow people to use Bitcoin but with greater limitations/restrictions than today.
No one knows what will happen in the future. As long as Bitcoin and other cryptocurrencies work their way to cooperate with the government, they'll be here to stay for a long time. Many governments still believe Bitcoin is used for money laundering and tax evasion, leading them to take certain actions which stifle the growth of the entire Blockchain industry. Thankfully, the transparent nature of Bitcoin's (and some other cryptocurrencies') blockchain ledger would allow governments to track & trace illegal activities easily. The ones in trouble would be privacy-oriented coins like Monero, Grin, and Zcash since their transactions are completely obfuscated from the general public. While it's easy to trace these coins via trades performed on a centralized exchange, P2P transactions made on-chain will be harder (if not impossible) to keep track of.
As I've said before, nothing lasts forever. If Bitcoin manages to survive for a couple of years from now, its longevity might be put at risk once all BTC are mined in 2100. Miners will still earn from fees, though. But if Bitcoin's price on the market is low, miners' operations will not be sustainable in the long run which would lead to the pioneer cryptocurrency's demise in the future. In the end, we should be prepared for the worst in this uncertain world of crypto. Just my thoughts
