Someone told me that just follow the development of the coins. Bitcointalk is already a good forum to check every coins because they all have announcement threads here. Just check it everytime and I am sure you can tell yourself if the coins are not scam and profitable.
I do not know whether this will be a good strategy, you know the station, but I also believe in the forecasts of experts who very positively speak about the future of Bitcoin and its cost. If you look at today's prices, they have already passed for fifteen hundred dollars and this was expected.