For me it's easy... If the markwt is down, i think of it as a crypto currency sale. I can now easily buy BTCs ETHs and other expensive coins at a very low price. Besides that, I'm sure that after a quarter or so, i will make money off of it. The kicker is, you should know the coin you're buying. Make sure that it will go up by tracking it's trend. Basically it is smart investing.