He can't help but to laugh at the wording. He is, in fact, ancient.

"My friend, I am several thousand years old."

Ignoring the question, since his own statement was mostly an idle observation, he thinks on Bakugo's dream.

"I was never quite so ambitious. Perhaps if I'd had even half of your drive, I'd have been more powerful. Why do you want to be so strong? To protect others?"