To be totally honest I would actually really not have any problem with selling some of my personal data (if the money i good of course 😅) and we kinda already do that by using Facebook, Google, etc. because they are actually not really free we simply pay with our personal data and by giving them user informations, search data, etc.
But I could really see that we could actually get paid for our data in the future. On some platforms like Twitch for example we already kinda get paid for watching ads already.
I would also sell most of my data. But the price would probably be too low.