To trade on a decentralized exchange, you need to create a separate purse, otherwise you can lose all funds. If you want, you must hack, but it is better to lose a little, than to lose everything.
In my opinion, Trading is likely the same when you are gambling, It has the high risk of losing your money. I don't trade but if in gambling, I have an experience with it. So I am saying that don't invest big that you cannot to afford to lose in the future.