As a rule, citizens of Eastern countries and Europeans are interested in purchasing e-currency. For example, in Germany, you can legally buy real estate, paying the seller bitcoins. In Japan, you can have a good dinner in a restaurant, paying the bill with cryptocurrency. This is very convenient, because you do not need to have a lot of time and lose huge interest for the transaction. However, not everyone is in a hurry to spend their savings in this way, which are stored in the form of a digital currency. Most owners of bitcoins who buy coins from miners, deep down hope that the rate will rise unexpectedly and there will be an opportunity to sell crypto currency profitably. This is one way how to earn with bitcoins. Thus, many of those who bought the digital currency as soon as it began to gain popularity, were able to make a fortune.
The idea as a payment method, I think this is its most important function, just unlike Fiat it will have some differences. This is the essence of its use in the modern world. But its volatility is too high. I think when they solve problems with volatility, it will be easy to use cryptocurrency, go to restaurants, exchange, save