Last year I've made a small fortune and I have $500k right now.
If this is true then you really don't need advice from people here - you'll certainly be able to choose better coins than I do, for a start.
As I'm sure you know it's all about research, understanding current state and using this to predict future state. What types of coin will prosper as advances in technology continue to change society? What will the world of the next few years look like, and which projects look best placed to play a major role?