You short when you should go long, and it's inappropriate to enter at a wrong and lingering point.

I always hear that you should not sell at a loss and I do not understand why I lose day after day.

If only I sold my currencies yesterday and invested in other currencies, I would have avoided losing about $6 today only and I might have profited from the new currencies. Those with experience, please advise
$PEPE $XRP $DOGE