Its up for the government, but if I were to suggest being legal is better, there will be some issues such as using it for illegal dealings but as a countermeasure bitcoin users can easily bring money to their country from another. So it easily helping with their economy just like that.
bitcoin is declared valid or not, it all depends on the attitude of the country where we live because supporting or not the facts that occur now are more and more users and business people start using bitcoin in every transaction, so it's legal or illegal is not important because all parties have begun to realize the importance crypto currency because it provides convenience in each of their trading transactions.