How would your finances look if you had gotten a 640% return on all your investments? It's easy to see why Bitcoin and other cryptocurrencies have been grabbing headlines. That type of profit makes some people desperate to jump in while the prices keep climbing. At the same time, some reasonable people, like Warren Buffett, are on the sidelines scratching their heads at what to them seems like a bubble full of hot air. How you look at Bitcoin or any other "next new thing" pro