And that is because you're applying more strategies and principles to it to win such trades. Not just all about luck or what not and you have to analyze what you do. That means that whether you're a good gambler, you can also be a good bitcoin trader. But it doesn't make sense that if you're not going to learn or study what you do.
Because everyone who has become a good bitcoin trader came from nothing to something. And gambling is like your extra session of learning trading because of the logical thinking that you can get from there through taking and managing risk that you are able to.