This guy said it already. Never use your Bitcoins for trading but we can't stop people from doing it and are eager to spend and risk their BTCs to the market. If they don't have any other means to trade and their BTC capital is all that they have, I'd tell them to stop and try to save first with another spare money if they want to hustle with the market. The times are coming and it's going to be harder to acquire BTC from time to time and these experiences might be worth it per se but it's more worth it to just watch the market do its own thing while you do yours and that's to do nothing but hold.