There are many ways to grow your BTC and Trading is the best way. Don't gambling , it's just wasting your time and your money.
I will not suggest him trading because trading is not for everyone. It is a proper profession and you need some specific skills for being a successful trader. You need to stay up to date all the time and cannot miss any important event taking place in crypto market. In short, I will never ever go for trading to increase my bitcoin. I will probably use signature campaigns for earning more and more bitcoin and will hold them to increase in value.