I try to keep a balanced 50% BTC plus a little bit more that i use to enter alts on very short term trades for some fun. I believe that 50% in BTC is a good way to keep safe and an aditional 30% in well established alts. Only 20% for more riskier investments, small alts, ico and profit or dividend sharing assets. That way i tend not to worry so much when alts are diving as i have other assets to keep the profits coming. Maybe it a conservative way of looking at things, but it gets me the confort of sleeping well everyday:)