If gambling is currently working for you, I suggest you just keep it that way for you to have that amount which is in no way a small amount and the reason for that is because in the case of investing, you need to be very sure and lot of analysis couple with several sacmas all over the internet, it might be hard to make a decision. In the case of trading to which sometimes could be profitable and at the same time could be an haphazard decision if proper understanding of the market is not obtained and knowing to right time to either sell or buy.