Not really,
Low market cap means no one interested enough of that coins.
Take a look at XVG 1 years ago, low market cap with single digit satosi per coins. who knows maybe if you invest in this coin 1 years back it can give you 900x return?
No one knows this, like many already mention, low caps means more risk but more risk= more reward.
That's not true. Many new projects are born and that's the reason they have low market cap. You can't expect a new -or even a not so new- project to start with a high cap. It doesn't make sense. If there's no product, cap should be small.
Alright, some coins are not following the above statement but that's an irrational market which is far from the mean, but everything falls into place with time.