At least 5% of your free money should be going into bitcoin and other altcoins (or into hardware for mining, participating in ico's, etc), and no more than 50% of your investment portfolio should consist of cryptocurrency.
I really do think that those who invest a considerable amount of money (whether that is hundreds or hundreds of thousands to you) will end up being successful in the long run, with gains that would take literally ten times as long in the stock market.
However, some of you people who are way richer than me who hate holding a pinch of stocks, having a 401k, bonds, or even holding some cash in person or in a bank are out of your minds. The crypto market is awesome but it is the most volatile thing I have ever even heard of.
Tuck some of that money somewhere that it just won't go away overnight, and where it can grow in a stable and consistent fashion. It is seriously worth the peace of mind.