You really must do your homework, invest your time in learning, reading, following cryptocurrency society, and then decide for yourself, then you will know how to find the right coins to buy. Then and only then you will not need finding anything, then you will know!
I think that the correct strategy for choosing a coin is first and foremost the choice of a rating exchange that can provide its ratings of the most popular coins. It is the exchange with a large volume of trade, will show the best results and the best coins for investment.