Its easy to determine what best coin as of the moment through looking at charts. But I think instead of looking for best coin, it better to look for good coin and diversify your investment. Spreading your investment would lessen the probability of losing money. There were lot of promising coin out there and better not to missed the profit that they might offer.
Consider to have tokens which has low value so you could buy big volume of this coin, be sure that it has big market cap but limited supply. This kind of investment demand long term period to see good profit. O the other hand, don’t miss to invest to the well-known coin such as Bitcoin and etherium which may also be a short term investment.