More bad news via metaphors. Your enticing success has your competition chasing you, and that means that, by definition, that they need to run harder and faster than you so they can catch up. Yes, many potential competitors are going to bungle the execution and vanish before they pose a legitimate threat but there’s a chance someone will catch up, and when they do, what’s their velocity? Faster than yours.
Getting too comfortable with success is easy. Continuing to be successful is hard. Making great stuff requires hard work. That's why so many companies and people fail to be great longer than a brief vapor in the wind. It's the constant drive to be great that can lead to repeat success. Now is the time to get stuff done. You can stop processing your inbox when you're dead.