Multiple options available, You could trade BTC to altcoins and USD and getting profit from buying cheaper and selling lower, not a safe investment method though. Other options would include investing in a startup stocks in havelock or something like that.
He have to be careful about any startup stocks investment, make sure that the place is legitimate so he can avoid scam. I prefer him for only do trading bitcoin to altcoins and USD. Because he can earn a lot of profit by 12 btc.