I'd say that "investment" is the wrong word to use for the huge majority of us who don't actually make a living with these things. So, I was thinking more of entertainment and fun when I bought an Insta360 One X2 two weeks ago. I'm still waiting for the bracket to suspend it from my Air 2S to arrive from China, so I haven't flown the camera yet.
But, the camera has already been a lot of fun and I'm astonished at what it's able to do and at the quality of the images and video it produces. Tinkering with it has been a great antidote to covid cabin fever. The viewer-directed 360-degree videos are amazing and you can upload them directly to Youtube.
It's a marvelous gadget, but unless you have a client in mind, it's probably a lousy investment.