I don't say that economy is going up and up everyday. Maybe in other country. But not all country is have a good economy. cryptocurrency as of now is good to know that have change a lot and still up so many people in their economy is interesting to know about this.
I think this is another function of cash is to be a currency exchange tool for cryptocurrency, so the selling value of cryptocurrency can be used for in the real world.
cryptocurrency is now much in demand, some people consider cryptocurrency as a valuable asset to them. but cryptocurrency has one weakness that is not the official currency. cryptocurrency is just a virtual currency in the digital world.