What’s keeping cryptocurrencies from mass adoption?   Speculators flocked to Bitcoin and many of the alt-coins in hopes of getting in early and making a big exit, but everyday users haven’t warmed to cryptocurrencies. There are many reasons why, but one of the largest barriers to mainstream adoption is the price volatility of cryptocurrencies. So the question is, why do the prices change so much in the first place? It comes down to supply and demand: Most cryptocurrencies have only…