Legalization is a very long process, we ard talking here about the whole world and not with a single nation. It is very hard but let us just take it in the positive way. May the legalization make BTC becomes useful and popular.
Many Asian countries have legalized it but again some of its big supporters like china and Russia have made some move against it in the past while they were big supporter of it once so it is difficult to say who is going to legalize bitcoin and who is not. Also, nobody knows for how long will a country support this currency but many businesses are accepting it and it has been praised by all great tech tycoons. The love of people for bitcoin is increasing and that is all what matters