I do not know exactly how many countries have become familiar with cryptocurrency so far. But what I know is that many countries are adopting cryptocurrency taking leverage of this innovation. Unlike in the past, the mass people have started embracing cryptocurrency. But in my country, any type of crypto-related activities are banned.
There's a lots of countries who's now catering the service of crypto though it's still small numbers compared to the actual count but it's far better than what it is way back 2-5 years ago, we can say that there's already a lots of interest coming from different sectors and they are seeing the usage of this system maybe adding 2-5 year more we will see mass adoptions everywhere.