I think this depends on the ubiquity of merchants that accept Crypto currencies as payment. Fiat currencies fluctuate against one another all the time and for t

I think this depends on the ubiquity of merchants that accept Crypto currencies as payment. Fiat currencies fluctuate against one another all the time and for the most part no one panics because over short periods of time it does not affect the man on the street. The price of bread remains unchanged for the most part. The man on the street can still take his dollar and go to the store and buy what he wants because all the vendors he uses accepts dollars as payment. This of course breaks down in periods of extreme volatility such as with Zimbabwe and Venezuela. If it gets to the point that Cryptos are accepted as payment across the board I believe the volatility will decrease to those seen in standard forex markets. Currently though it is seen as a novel investment and as such is traded as one. In addition it still needs to figure out its "True value" in order to establish a baseline.