If all countries legalized Bitcoin, the Bitcoin price would be more stable than it is today. Of course we will find it difficult to see a bull market as we feel today. And while currently Bitcoin is not legal in many countries, I see no restrictions for the use of Bitcoin so far. We use Bitcoin so far it's still smooth, I haven't found a blocked Bitcoin wallet. Of course if Bitcoin is legal, and certain rules are in place, I'm sure there will be high taxes here.
I actually think that if Bitcoin is legalized in all countries and the price becomes more stable, then the profit from trading or traders will be less as they usually do (buying at low prices and then selling at high prices after a long time of patience). And when Bitcoin is regulated by state rules made specifically by the government, then obviously it will be related to taxes, as well as certain restrictions that the user should not violate because every transaction will be known by the state.
On the one hand, the legalization of Bitcoin can indeed make it easier for users within the country and can also attract more new users in all countries.
But for now I'm still happy when Bitcoin is not prohibited from being traded on crypto exchanges and is also recognized as a legal asset for investment and trading even though it is not legalized into payments for goods and services as happened in Indonesia.