You only lose money trading if you sell lower than you buy. The only exception to this is if a company goes bankrupt or the price never recovers. This goes for any market.
If the price drops below what you bought it for, just WAIT.
No, if you realise the loss, it falls still lower, and you buy in then, your loss is minimised. The fact you're already sitting on a loss shouldn't stop you selling if you think it's going lower still.
That still doesn't negate the fact that you lose money if you sell lower than you buy. You don't know what is going to happen in the future, so waiting to buy in doesn't guarantee that the price won't keep dropping. What's better than minimizing a loss is not accepting a loss. That's the reason most day traders fail.