Thinking yet? Let me help you.
You should start playing blockchain games, because:
1. In contrast to usual video games you owe products you bought for your game. And blockchain controls all the operations;
2. You dont need to invest money to start earning;
3. You earn crypto;
4. Its only in your hands. Nobody can influences your chances to win. Its just you and your gaming skills: the better you play the more you earn (up to $3k);
5. There is trading too;
6. You have more possibilities to earn;
7. Competition is low. You can make a good profit just being professional;
8. DApps users number will be growing comparing to traders.
undoubtedly, for a gambler, the blockchain game is very profitable, since in such games everything is transparent and honest, since only the experience and success of the player affect the results. But just do not need to call gambling a means of earning, especially without investments, as you said. If there is luck, the player can receive a certain profit, but any gambling cannot be a source of income.