Lets start with the question if Crypto currency could be used as a normal curency like your dollar , baht , euro , or pesos . So first of all The worth of cypto currency is changing all the time so you could buy a house with your bitcoins oneday and on the following you would just be able to affort a Sandwitch with the same amount of Bitcoins. This does happen beacause Bitcoin or any other Crypto currency is worth anything beacause people think, beacause people believe in this projekt, Bitcoin, Litecoin, or Steemdollar do not have a worth, there are just worth anyting beacause people believe that this virtual money is worth anyting.
Second there is no equivalent in gold or anyting valuabe. ( Euro or dollar are equivalent to the gold reserves )

These reasons are enough to say that this currency, that way it exists today will never be able to be used as the "money of the future".