If you want to have a career and a monthly income from Bitcoin, you must start your own project and work to make it successful in order to obtain a monthly income.
As for simply investing in Bitcoin without building your own project, it is different from a career because you buy and wait for a rise, and this may take months or years. Therefore, in long-term investment, it is not possible to rely on Bitcoin to obtain a career and a fixed monthly income.
Right. I think it is a great to build your career from bitcoin. It does not necessarily mean that you stick on bitcoin alone. Building a career in Bitcoin and cryptocurrencies often requires a strong understanding of blockchain technology, programming skills, financial acumen or a combination of these skills. Continuous learning and staying updated with the latest developments in the industry are also need to build this crypto career you aim.
What you two are talking about is building your own project with programming and technology related skills, and to do that we need to be fully trained, at least a university graduate majoring in information technology. And what OP is saying is that he only wants to invest and trade bitcoin, and he is trying to imply that he only needs to invest in bitcoin to build a career. And I wouldn't agree with that, he just wants to use his savings to invest in bitcoin, hoping that it will bring him wealth without having to work.