Absolutely, a side hustle has to be acknowledged for what it is too, so unless choosing a useful job that does add to a resume or, brings other benefits, the money is all that matters. Flipping burgers can be fun. I have friends who do some basic course and teach Zumba classes - as that way they can stay fit doing what they enjoy and earn at the same time - one of the people doing this is a person who is a management-level professional in an IT company in her early 50s. She loves it.
but point is, if you have a side hustle (like baby-sitting for example) you may not want to take this job at the Mariott.
For sure. I'd be flipping burgers before part-time at a hotel - it is brainless, people are fun and I can think other things while doing all of the tasks.
But, for someone working 40h and not having enough to invest, a side hustle can give that extra 10% or so to create some kind of portfolio. In crypto, that might be enough given time :)