Bitcoin! Ethereum! Ripple! DoggieCoin! JesusCoin! We're all gonna' get rich, rich, rich! Uh, not so fast. Let's conduct a prudent analysis of the advantages and disadvantages of cryptocurrencies. The technology behind cryptocurrencies, blockchain, will survive. The 2000+ cryptocurrencies won't. (Well, probably a few will survive. In the meantime, please stay far, far away from these modern day tulip bulbs. You've been warned!)