Understand, it all depends on your (personal) expectations. A "small amount" - as you wrote, it's different for everyone. If all of a sudden, have not invested before, it is better to take a look from the outside. If we are talking about altcoins, you need to analyze a lot + compare many factors. In comparison, it's definitely a bit better to save savings in bitcoin. But the % of income, you can get much less. Again (to reiterate), it all depends = on the amount invested/for how long/what your expectations are.
My one of my favorite strategies, the invested amount is taken away and the free coins are left for long term storage. In that case, 0 excitement and can expect growth for much longer. In that respect, everything is as individualized as possible.