I think the potential lies within the block-chain technology and not really the coin itself. Sure, Bitcoin, has the sexy-sweet name and it was the first of its kind...but it has flaws. It has high transaction costs (for crypto that is). The block-chain is tangible in that it is a random generation of numbers and that generation of numbers is unique to the coin that people hold...that gives crypto a very bright future. The reason why crypto-currency is such a hit right now is because of the possibilities it hold for the future of the world. Never before has there been a global currency and that solves so many problems. I really do not want to get into the specifics but just think about it:
There is no longer a currency exchange.
People can exchange with each other, where ever, whenever, and it is instant.
NO REGULATION
There is a very large community that believes in these principles on Reddit and it is growing by the day. I highly recommend checking out what they have going on over there... and to answer your question about today. I was watching CNBC today as the run began; before the trading platform crashed. All they were talking about for 2+ hours was Bitcoin and sure enough it ran. That and somebody moved about 14,400 BTC which will always cause market fluctuation.