I assume that when you said "investing" you are talking about investing in cloud mining versus setup your own mining rig. If you have access to free or at least cheap electricity then mining your own coins is good for you, but you have to consider having a partner in running your mining farm because you can't do it alone if you plan to run it 24/7.

Cloud Mining is tricky because aside from qualifying which one is legit and which one is just ponzi, you have to consider the ROI. Hashnest is related to Bitmain but it doesnt mean they are legit however ROI there is very long.