congrats man, I probably dint take too much notice of your post especially as I am not keen mining alt coins, but in terms of "buying" coins perhaps I should have gave it more attention. I have always seem alt coins as a riskier purchase as I dont think they will be long term as steady as bitcoin, but they definitely do have larger growth spurts as you have benefited from.
Feel free to give us other tips in here, as other new coins might pop up, I may purchase some alt coins based on those tips.
Pretty much any coin that can become a masternode has gone really well if you look at them and any that give privacy like Monero etc have flown up so when I saw Solaris had masternode and was getting privacy added I got in.
IMO one of the if not the best way to profit is to mine your way to a masternode as they then basically mine coins for free which you then profit from.
Just to name a few sites which show masternode ROI (obviously this depends on the price staying the same etc)
I'm not saying to buy the coins etc but if you look into the prices of them most of them would of gone up from what I've seen.
I've spent a fair bit getting some parts for some more mining PCs and I'm going to mine my way to a few more masternodes with them.
If you can start mining on a coin that is going to be a masternode coin though you can rake it in as the less masternodes the more coins you get and obviously there wont be many at the start (If you look at the sites above there are coins that have a ROI in the 1000's to begin with)