Cryptocurrency needs to be bought at the lowest possible prices, and sold at the highest possible. Only in this case, we can hope for a profit. If you bought ethereum at a price of $ 600, then selling it for $ 275 will bring a loss. In order to make a profit in this case, it is necessary to sell it when this coin will cost more than 600 dollars. Given the current state of the cryptocurrency market, it will not be soon.