Stoploss is a must for trading! Newbies tend to forget this command, but you have to remember putting stoploss on every orders you have.
Trust me, I have lose quite a lot because I did not use stoploss for my trading orders. We can lose 3-5% for stoploss, but without stoploss we can lose around 10-20%.
For example, you bought bitcoin at 18k, but you did not put stoploss at 17k5. Now bitcoin is 6k.... Think about this case guy