I need help

I want to make another series I have a YouTube channel and I made a ghost hunting series but everyone stopped watching that after awhile so I want to make a new series but I don’t k ow what anyone likes so I don’t know what to do a series on can someone one help me please?

Can’t really help you out, in that I don’t much look for what’s trending at the moment; I create the content that speaks to me, then market to that niche, whatever size it turns out to be

What is your series?