While cryptocurrencies might sound like a great investment opportunity, there are some caveats to entering this volatile market. The biggest concern many analysts have around cryptocurrencies are the speculative nature of the marketplace. "A coin's price ultimately depends on the supply & demand dynamics in the marketplace. The price goes up when people want to buy it, and there are not enough coins to be sold at the current price. The future price is entirely dependent on what other people will buy it from you.