I'm not really sure how to answer this but yes you can example like working on exchange or writting some blog or making video about crypto, 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
What I mean is that not all have the same skills with it regards to technicalities in crypto. But if you are skillful, probably my answer is yes, it would be profitable if you will work hard in crypto as a full-time job. There are many opportunities possible a blockchain developer can do, one thing that I like to happen is a presidential election through the use of blockchain which you can see the vote result publicly.