As a side comment, it’s clear that Bitcoin is not as anonymous as many people think, and that governments are evaluating its potential use. They certainly have not condemned it out of hand. Furthermore, there is a movement afoot by governments and businessmen to impose regulations and eliminate or restrict anonymity. Assuming Bitcoin or a successor survives and becomes more widely utilized, this is certainly what will happen. Indeed, it is happening now.
In my view, Bitcoin is not a currency (not yet, anyway). I would classify it as a “digital asset” due to its extreme price volatility. (One function of money is to serve as a stable store of value.) It resembles gold or stocks (equities) more than money. However, it can be used for financial payments, whereas gold and equities virtually never are.