Well, for me cryptocurrency is cool, because it retains the positive elements of the gold standard (only a limited amount available, countries can’t just increase the amount of cryptocurrency to try and artificially stimulate the economy). Also, at the same time, the big ones like bitcoin are becoming more and more liquid.
Then, think about how hard it is to steal – almost impossible unless more than half of bitcoin owners are in on it, I am led to believe. But with the new cryptocurrencies its probably impossible.