The speculative aspect of cryptos is because we’re still trying to figure their value out. How much is a Bitcoin? How valuable is it? This happens all the time in markets with new assets.

As for the question, it’s up to everyone. Is this a currency to us? If yes, it will be. If not, it won’t. That’s the point of a cryptocurrency: you’re not forced to use it. The dollar is a currency, but why? Think about it. Is an apple a currency? Why not?