It is difficult to choose the coin if you want to invest for only two months because there are too many coins in the market and we don't which coin will increase. But if you're going to invest for a long-term like for more than five months, then you could choose the top ten coin list at the coinmarketcap, and you can select one or two coins as your investment. But maybe you can find the coins by watching at the market and try to buy low and hold it for a while, and if the price can increase double, then you need to sell. With doing that, I am sure that you don't have to wait for two months to see your profit.