Oh my gosh, it's so addicting buying more BTC! ...mainly due to wanting to buy more altcoins.
Currently though, I am trying to stop myself from buying as it's eating a hole through my wallet, so unless it dips pretty heavily, I've made a promise to myself to only trade with the profit I have made from alts. I am holding 50% of my BTC, while the remaining is used in crypto trading.
Same with me and my behavior.
Especially good ICO´s are too good investments to be missed. When you keep your eyes open and have a good common understanding about the market you definitely can earn much with Altcoins. Nevertheless Bitcoin is of course not that bad. ;-)