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.
So far the value of Bitcoin was 3670$ which is really good chance to buy for those who have budget or capital to do it then hold.
Aside from that you can also buy ethereum now due so far it was 124$, also buy Neo, Xlm, Nem, and Qtum too. Then never sell them instead hold em until bull run happen.
if asked how to get profit from falling prices, of course by buying it. because when the price falls the opportunity comes, you can buy at a cheaper price before the price rises again? the point is you have to know the lowest price that happened, or when the price stopped going down and you bought it