Mining something which you feel is a hidden gem is NOT the thing from which you can maximize your profits. Instead, use whattomine.com to find out what's the most profitable to mine right now and then once you mine a bit of it, you can use that to buy that hidden gem (instead of directly mining it with less profitability). That's what I do and it goes out just fine.
I come across more and more people that uses this tactic, and I must say that its good one. Simple holding and waiting good price now days has proven to be bad tactic. This way, with a little more effort added person can maximize their earnings and earn more money on shorter time period. This also keep the money going, which have good effect on market. Also this way you will be able to buy more promising coins, instead of mining one at the time.