As much as I think it's the currency of the future, I do worry about keeping lots of money in a system that relies on network accessability and electricity. Maybe it's the dommsday prepper in me but I like to diversify my investments into BTC, Alt-coins, gold/silver, cash and things I can use to be more self sufficient today and in the future (solar/wind, etc). I don't wanna be that guy around the fire saying 'I was a millionaire until they flipped the switch". I might be being dramatic, but think about it.