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Bitcoin is already legal in lots of countries. If you check Wikipedia you’re going to see that there are lots of countries there that are marked as countries where Bitcoin is legal, and there are places also marked as where it is illegal. So, it’s already legal in lots of countries, But we are hoping for all those countries that have banned Bitcoin too make it legal and allow their citizens to start making use of it.
I think it is the other way around, there are countries that already came with a law to ban or accept them and then there are countries that are neutral to the new cryptocurrency market because they did not come up with a law to ban or accept them. If you look at the market, the majority does not have a legal framework and hence we can say that it is neutral towards the cryptocurrency market at present.
Although I know that banning Bitcoin or not doesn’t really stop people from making use of it, because people can still continue to make use of Bitcoin since it is decentralized and they can’t be traced. That’s why we have P2P websites or exchanges that will help people to carry out their transactions with Bitcoin without the government or anyone looking into it, and controlling it.
Users who are intelligent will always find a way to overcome restrictions and if there is a country that restricts them then they can trade from countries and platforms that accept them. In short it is impossible to restrict the market, the best they can do is to make things difficult.