Bitcoin has been traded by most countries in the world, it's just that the legality of Bitcoin is still not widely accepted. Bitcoin has been quite popular until now, most countries have traded Bitcoin legally and illegally. most likely in the future as you mentioned in 2025 the Bitcoin community will be more and more
The fact remains that majority of the countries there is no rule dictating the cryptocurrency market and only a few countries banned them altogether and the truth is that it is impossible to ban a virtual currency even though they come up with any legal framework.
One thing we have seen throughout its short history is that there are more investors getting interested in the market and 4 years down the line, the total market cap will be multiple times higher than we have now.