Nah, if he had progeria he would have died before he was even a blip on the radar. 
People who make fun of otherkin are generally also people who make fun of transgender issues. That's probably got something to do with the fact that if someone says they're a dragon and they, well, look like the type of people who run a fucking furry blocklist chances are they're total retards asking for trouble and attention and should be mocked accordingly.
Thanks for a screencap with the new Twitter account, it has some erm...quality tweets in it. He's evolved from just vaping into full on junkie.

Can't archive as I am using my phone right now but there's some updates about him, he considers himself an otherkin.
https://nulled.red/@luminol