Maybe when have country want to convert with crypto currency will make directly of crypto price on higher, many altcoin kinds will be on the top price and all of country will allow what have the first country doing for legal bitcoin transaction.
If that happens, I am sure the cryptocurrency price will rise, and trade transactions will increase. Maybe competition will occur from cryptocurrency, and I expect bitcoin to become the most widely used crypto money in the entire world. However, before that happens infrastructure that supports the use of cryptocurrency must be available, especially fast and stable internet.