If we dare to face the truth, the idea of bitcoin becoming a legitimate global currency is really a pipe dream. Governments will never accept a currency they cannot control and they have no shortage of better solutions. There is no reason for them to favor a currency they did not create and cannot control.
They dislike Bitcoin, no doubt but if they can not kill Bitcoin, and they actually have failed to do that, they have to change their mindset, policies and regulations on Bitcoin. Over many years, more than one and a half decades, governments have started to accept Bitcoin in more nations globally. It's an upward adoption trend for Bitcoin at government and national scales.
Additionally, bitcoin has too many limitations to be a currency as it can only process 7-10 transactions per second, which is too slow compared to traditional payment systems like Visa or MasterCard, let alone compared to altcoins.
Given Bitcoin's decentralized nature and security, it is more suitable as a store of value, an asset like gold.
Bitcoin is better than gold from total supplies to its security and privacy for Bitcoin holders. Gold is very cumbersome for gold holders while Bitcoin is very light and easy to own and store safely, securely and flexibly for Bitcoin holders.
The bullish case for Bitcoin is a book with a lot of insights on Bitcoin and comparison between Bitcoin and gold.