 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. There's no feeling of acceleration—some kind of false gravity they use in the future. The museum's closed, but I'll be glad to let you study whatever you need for realism in your role.
 retire
 retire  grow his company and make more money  go to another dimension  travel back in time again