I have never owned many but I have maintained a small group of new gtld's. It took a pandemic for me to make my first .media sale which is an extension I always liked. I sold Star.media, and though he did not take the offer, working with Michael Berkens I was pleased to see a $15,000 offer come in for TV.media, one of the .media names Mike owns. I sold sponsored.link a few months back as well.
I think a lot of extensions are difficult to invest in due to little reported sales. I have looked at a few names and thought maybe I pick this up, to see 0,1 or 2 reported sales in that extension. If it was super great maybe I would buy but I don't want to play for an outlier and make the only reported sale in an extension.
Years ago I sold OnlineCasino.website and that got me off to a start as far as sales, I sold VR.watch wholesale but for a profit and short holding time.
I have some names in topics I like, I love esports and own Esports.video and for the low renewal price it's a good hold, would be a premium price in many new gtlds. It has received two offers but just low ballers.
Theater.life and Robots.life are my only names in that extension. Robots.life already sold for $2,500 once. I got it after the end user dropped it, for reg fee.
Theater.life has been the one that has gotten some action, 3 offers, one accepted then they backed out due to having some other bills come due.
Stock.loans had $1,000 offer I accepted, the buyer admitted to front running.
https://tldinvestors.com/2020/05/stock-loans.html
I still own 3 .media all which I like and know I can do something with (same as I would like to do with esports.video if I can't find the proper price). FS.media Fantasy.media and ABC.media.
My sales are reported to Namebio for verification.