Yes stick with Bitcoin holdings and invest your time (not money) in other side projects that have the potential for a large payoff with small downside.
Two examples are JSECoin and Yenten - these can both be mined using a CPU
JSECoin unlike so many other cryptos has a genuine real life use case website monetisation / advertising. It is currently pre ICO so you have a chance to mine some coins now that could do well in future.
I like Yenten as it has no premine and is a CPU mining algorithm. It also has a fun/crazy website and could catch on. Its cheap around 6c and Ive started mining it for fun and will try to buy more if gets bit cheaper. It does have a tiny mkt cap and low volume but I find it interesting and fun project for some reason. Here's good post on mining it
https://medium.com/@tsarbuig/yenten-discovering-the-next-doge-3b36f797f764