I got lucky and started mining DOGE really early.. now with the difficulty incredibly high, I'm looking for the next best thing. I usually just comb the altcoin forum and randomly pick new coins that look promising; it seems that resources such as coinmarketcap and coinwarz don't really tell you much about what coins will grow or stagnate; speculating via this forum seems to be especially hard with the amount of chat traffic the altcoin forum receives.
What are your techniques? Everyone else playing a guessing game, has some good intuition, or resources?
Most of the time when a new coin launches it doesn't look promising till a month or two later when dev's start doing their job. Unfortunately by this time all the super block/early mining rewards are gone which means you either win big or lose out. For example doge's launch was total shit and look at it now. Of course no one can mine a million or more doges these days so if you missed out try to find the next best thing before it happens.
This is why you see people with 50, 100, or more MH/s mining what appears to be total crap coins.
No one thought infinite coin was going to be worth anything. Read all the early hate (same as any altcoin these days) And yet a simple $100 investment (1 bitcoin back then) in july/august (was going for about 15 LTC satoshi) which would have netted about 100,000,000 IFC would now be worth over $10,000 due to the growth of bitcoin, litecoin, and infinite coin. Which is a much better ROI than just holding BTC over the same timeframe. All in just a little over 6 months. Obviously you wont be able to get such amazing results without bitcoin/litecoin increasing another 10 fold, but it totally is possible to make a decent return.
IFC again is a good example had BTC and LTC stayed the same price you'd still have made more than 33x ROI.