Bitcoin is well known and popular in most countries, but many people still do not use it because of concerns about its legitimacy. Many governments still haven't accepted bitcoin so people haven't dared to use it yet. But I believe that with the huge taxes that the market brings, sooner or later governments will accept it in the future. It cannot be a currency, a method of payment, but at least it will be a commodity, an asset.
Your government doesn't have to accept it for you to use it, that is one of the great things about BTC, it is permissionless, you don't need permission from any authority to use it, the only problem may be when they ban it because you would then be scared of legal problems if you are caught using BTC. BTC is a currency and is being used as a method of payment, if i want to sell something to you right now, i can accept BTC as payment for what you are buying, that's why it is a currency.