This is so disheartening that you both fall on the wrong hand, we many occasions where this was trace to people trusting who they are that familiar with, someone that just meet on an occasional basis and believe in whatsoever thing they said and no where to trace and find them, possibly you just have their contact which can cease to function after you're being scammed, i also dislike this category of people who don't know it and will give you all the go ahead to help them do it without them interested in seeking to know how its been done.
Why must you limit yourself to a particular skill you could just learn and help your career, my advice is to always get someone you're acquainted to and confined your trust with, who can put you through for you to be independent and while doing that, you also have to help yourself in making more research in attestation to what you're learning is accurate.
Let me assume that thks time you didn't invest in shitcoins possibly as you have done in the past because you specifically bracket bitcoin in front of the cryptocurrency, i also want to believe that your friend is back on track after he had acquired a certain level of knowledge in bitcoin and cryptocurrency at large before deciding by going with bitcoin and this time as well, he goes all by himself and not through the first person he used.
Lesson: what you don't know will cost you more than it will pay you.