This is a great idea... we will talk with the editorial team to see about adding a market or two related to the bitcointalk forums.
Bitcointalk community: What do you think would be the best suggestions for markets? So far from famososMuertos we have:
• When will the first user reach 10,000 merits?
• What year will the first user reach 10,000 merits?
• When will user number 4 million register?
I like these two sentences, they really turn out unpredictable, because they depend on the activity of users and on the value of posts by advanced users and everyone else too:
• When will the first user reach 10,000 merits?
• What year will the first user reach 10,000 merits?
As for the third sentence, (• When will user number 4 million register?) it really may not be accidental, especially taking into account such a fact, which was recently revealed here - Chinese BTT users opened many accounts simply for advertising purposes in order to promote some kind of their project. These actions may not be entirely random. So it doesn't quite fit.