The other way was working as Blockchain developer on some sector like Oil, Market, Food, etc and also being a lawyer or even marketing on some blockchain-based company
This is not easy to achieve as you need some extensive knowledge about blockchain technology. I work in the IT industry and the qualifications required to apply to these jobs need experience of almost a senior developer. Job offers about cryptocurrency is not yet common in our country unlike in the US. If you plan to treat crypto as a full-time career, your only choice is only through trading.