When he losses 5 btc.he should have realize that luck wasnt on him.and stopped right away.why waited for 50btc .its a big loss that can change life for good.if he only valued the BtC as fiat
There is never a good gauge whether 5btc or 50btc or even 0.5btc is the relection point. It is all about mentality. If he is too obsessed by chasing the lost, it is just a matter of time that he will lose it all.