Do you think Elon Musk will be interested on things he cannot get something in return? Elon Musk is very well known businessman and he's not into good thing on sight since what matter him the most is to multiply his money.

I don't see him get an interest about NFT and maybe he didn't find it worthy to spend he's millions there. Also he can just hire some people to make a avatar for him at more cheaper price rather than paying for a pic worth thousands or even million.