There's nothing necessary to quit bitcoin trading, because if you can spend more time over the observation of price movement even if price goes down, can make a profit out of it.
Yeah and he is more experienced with all the knowledge of markets and stocks now so it will be better for him to continue the trading as it will be more profitable doing trading getting more experienced with it !
i think the best way to trade alts coin\BTC or USD\BTC is to do only 2-3 successful trades per month for example i have some btc stored in poloinex & bittrex .read the markets well -wait the right chance - do 5-10 x trade example as in ETC for the last 4 days .
Trading is the best .