Bet.

I think that if you agree on a bet with a specific person, there should be conditions that suit both parties (i.e., mutual concessions). For example, I wouldn't agree to play for 10 hours non-stop because I physically can't. However, I think some conditions, such as mandatory streaming, are quite acceptable. I believe that if you want, you can discuss everything and find a compromise. IMHO. And if you issue a simple challenge on your own terms, then:

Accepted, ready to start in the middle of next week
I can transfer the money as a guarantee today