In this case, the most correct decision will be to keep and not sell all of its assets, since based on statistics, it is the long-term investor who wins more often.
But it would be suck if the market keep falling down without any signal about bouncing back. So i guess you choose the keeping decision.
You never know which way the market will go. Therefore, if you do not use marginal trading, never fix losses and you will be in profit.