I heard in stocks, this is called shorting. But i read if you short, you could lose a huge amount of money. Could you do this with bitcoin? Example my thoughts were hey its the holidays, so most likely ppl will withdraw money and thus btc drops. So i figure around now, btc price would drop.
If you plan on shorting anything, consider taking a financial markets class and an economics class online. Otherwise it's a total shot in the dark. Even among the top financial players there's winners and losers.