I think, maybe to have both btc and altcoins. Yes btc nowadays is like a jerk jumping up & down but the thing is, most of the altcoins were just dependent on btc's performance on the market. As you notice, when btc drops - there will be a bloodbath in the market of at least 90% of altcoins plunges down. But when btc rises then eveeything follows.

So i think, better to have both btc and some selected altcoins. What do yah think?