What will you buy when the BTC falls? I believe that he will inevitably fall...
Buying usdt is actually a good option if you predict the price will fall. But if i have to choose other alt maybe i will buy neblio, neo or eth whenever btc fall as they are the more likely to recover and go up in price because it has a lot of potential and supporters.
Bitcoin price will fall but it will rise up again as it has been doing the same in the past. If someone will try to google out the future of bitcoin or just its price then he will discover experts saying it to be nearly 10k dollars after few months.
They can be wrong but the chances are that almost zero. Bitcoin is highly in demand now. The supply is actually not a little but scarce one. One day it may get stable but the price won't be less than 25k to 30k dollars.