Price per coin doesn't matter much tbh look at iota it's selling at around 4$ for 1000 coins.  You have to take into consideration the amount total in circulation and above all should look what coin can increase its value fast. You can buy coin under the 1$ and it gets pumped till 1.5$ and on other side you can buy coin for 10$ that gets pumped over 100$ for instance.  Ot doesn't count for buying low priced coins bit chasing ones that can increase its value the fastest, you don't even have to buy the whole coin to get nice returns.