To trade or not to trade

One of my friends is currently being trained to trade on Forex. Whilst playing with money that is not real I think he is currently up a few hundred pounds.

This seems to be a whole niche industry of small traders who if they keep to the rules and don't get greedy can make good money 80% of the time.

I am wondering if this will be a better way to fund a start up than give equity away for cash now. Trade your way up to a few grand! Obviously you could lose it all but with

Stop positions this seems hard to do! It cannot be that easy