10% is a good stuff i would also do this but at this point im not buying bitcoin but working for it instead. Meaning 100% of my effort in a job is in bitcoin. And then convertin 80% of it to cash and 20% stayed as bitcoin for trading and investing in ICO's. I can say this is pretty effective for me.
I like this strategy as it reflects the way I do currently in my finances. However, I am the other way around, I am budgeting 20% of my cash to bitcoin and the rest of the cash are for bills, entertainment, and brick and mortar investment. I use bitcoins for online casino investment, loan and earn from interest, sports betting, and trade. I want also to check the ICO investing - looks very interesting.