If bitcoin become legal across the globe that will be the start of the bitcoin mainstreaming and bitcoin will be used as a legal tender. But even with the legalities bitcoin needs to overcome some big issues such as slow confirmation rate, areas without electricity and internet connection, poor people who cannot even buy computer or smartphones. So possibly it bitcoin is legalize the usage of bitcoin will still be limited in urban areas with people who can afford to purchase computer and smartphones. The problem will hit the extreme poor people and the people in far flung areas that has no access to electricity and internet connection.
it makes sense, would be a major problem about internet needs in areas that are not affordable. but I think in the future, all regions will be affordable for the internet. and there will be lots of atm for bitcoin. so they can use or without a card.
I agree with you Bitcoin ATMs can solve the problem with the popularization of cryptocurrencies around the world. Perhaps in a few years we will no longer recognize the cryptocurrency market.