My guess is that Trump took notice of the news surrounding FTX and Sam Bankman-Fried. The words "grift", "crypto" and "billions of dollars" trickled through the thick walls of his skull, an errant neuron fired and established an association with himself. Then he angrily yelled something about Barron's computer and Eric figured that meant doing something with NTFs.
I mean, seriously, does anyone here really believe Trump actually knows how NFTs are supposed to work? I don't think this drooling idiot understands the grift he's doing this time.
ETA: he's calling them "trading cards", FFS. Like the cards kids are trading between classes at school.