 What does the older man plan to do after this event?
You will, you know, so why quibble about it? At least, you always have ... or do ... or will. So let's begin when you get up in half an hour and come out with me. Yes, it'll be pretty obvious it must be a time machine. You'll be puzzling over what I'll tell you, and you'll be getting used to the idea that you are the man who makes atomic power practical. You won't exactly believe it, but you'll want to go along. I figured out once that such a universe would need some seven or eight time and space dimensions. That means you either carry a small time field with you, or you are catching a small increment of time from the main field.
 retire
 retire  grow his company and make more money  go to another dimension  travel back in time again