Crypto currencies are, for the most part, unregulated. There is no assurance that one is getting the best price in a crypto transaction. It is possible to make money on various cryptos because they continue to be bought and sold. But you have to do your own research on which one may be the best to buy at any given time, and decide for yourself how long you will hold it, and at what prices you will sell, either to make a profit or to minimize losses. There are a lot of crypto exchanges. Read some of the crypto bulletin boards to get a sense of which ones are trustworthy.