Trading and gambling will give you higher earnings but we cannot afford to ignore the risk associate with, so if you want safe earnings then best choice is to go for signature campaign.
I agree with you with trading and gambling that it comes with risks. But for trading,you can minimize your risks if you study trading well. So much better if you invest first on knowledge and start bitcoin trading in small amount.
Yes a little research and having a knowledge with the thing that you want to do in all things like business and things that involves money is a great way to start with it. Trading is much more likeable to gain profit than gambling. Both have risks but like you have said, a little knowledge with trading will make the difference. Plus, gambling is for person who already have a big amount of btc or money. And that the money they gamble were those they are willing to lose.