Choosing a coin to buy practically depends on what i want to benefit from the coin and also how long i intend to hold the coin. There are some coins that can only be profitable on a long term based while some are good for short term. If i want to hold for a short term then i will go for mostly shit coins that can produce 2x, 3x, 4x in a short period but if i want for long term then i will go for coins with working product and a good team not greedy team.