Real money is backed by gold and silver, and its value is affected by many things.
Crypto-money on the other hand is not tangible. It's backed only by data from a computer which is only useful for darknet transactions.
I call it the lazy man's currency because people see it as free money that they don't have to work for, all they have do is run their computer and watch the value grow. However the whole thing in my opinion is foolish because anyone with computer skills can make a crypto currency and then saturate the web with different types of e-coins. Eventually that will lead to a large inflation and soon the whole the collapses. Once that happens, all you are left with are useless imaginary coins.
I think bitcoin already has immense value. I'm not saying it's set to replace physical currency, but cryptocurrency is a really good solution for online transactions.
There are always people who see something new and try to make something oboslete. Wouldn't surprise me if some groups try to make it the new official currency. People are already trying to kill off physical currency with debit cards, credit cards, and microchip implants.