I'm not talking a main job and then a side hustle, more like two or three jobs each with a fortune 500 company.
Back in the day, (20+ years ago), one of my brother's was working as a contractor for a US company in Papua New Guinea. One of the guys there could "dolphin sleep" (a total of two hours a day), and this meant that he was working two full jobs for the same company, across the two time zones. He was earning very well.
Obviously, his company knew about this arrangement. However, I wonder if it is really possible to do a good job if spread as thin as Google, Meta and IBM. I work a lot and I am not the cleverest, but it is very difficult to keep up with it all. But, I don't have a supervisor for my own business, nor for crypto stuff. If I had to answer to supervisors, I don't think I would pass muster.
That is very interesting. I know over here people will retire from a job and pull a pension then start up somewhere else and eventually pull a pension from there as well. It might not be 100% vested, but they are likely pulling it in. I have a feeling what these people are doing probably work better on a project based team. Where they might get their piece done in a short amount of time, then they need to wait to proceed. Probably similar to the way people pick up multiple jobs on Fiver or whatever that platform is.