The greatest way of losing your money in the crypto market, is either by being liquidated, or by being scammed. For you not to be scammed, you need to follow the rules of the exchange. And when it comes to liquidation, you need not worry if you're a spot trader. Whether market crushes or whatever, by following the first rule which says; "hold is gold" , you surely going to have your money back and secured.
Hold until the market goes back up, cause it isn't going to stay down forever.
Don't forget; futures trading is same as gambling.