Why do we need so many prequels?

dk
MemberLegendJan-29-2020 6:24 PM8300 Views6 RepliesSorry- no pics.
Why do we have so many prequels to franchises like Alien, Star Wars and even Predator- and possibly The Thing?
Personally, I wonder if there is a lack of ideas in advancing ideas and so things go into the past.
Prequels can beget more prequels too since there is a sense of always wondering "What happened before that?"
I suspect that movie franchises can't figure out how to move forward (or just let a movie stand on its own).
I smell Money as the main motivator when it comes down to the nitty gritty.
Thoughts?