Rather we should comment him positively so that he re-explores the crypto industry.
Again, there was nothing particularly negative about the billboards. Plus, he's shown no inclination whatsoever to look at crypto in a positive way. I doubt there's anything that any one of us could say to him that would convince him to reconsider his stance. He's very much set in his ways, which is understandable. It's not like he's suddenly going to "get it" one day and think it's a great idea after all.
If anything, I'd assume the billboards aren't even
aimed at Buffett. This was likely an attempt to appeal to the
wider public who see the billboards and suggest that
they should explore the crypto industry and not just dismiss it outright because Buffett said so. Think of it as a publicity stunt to change the average person's perceptions, since it's clear Buffett isn't getting the message. Appealing to him is a bit of a lost cause at this juncture.