I'll enter! I assume it has to be bets that are still open, i.e. we can't just make a load of bets and then post the winning ones here

As per the OP it says that all bets must be closed out (resolved or sold) so having only open ones is not a requirement I'd say.
Hi all, just to clarify... for this competition, bets do not need to be active when you post.
Argh, my impatience was my downfall! I posted my 3 bets when they were still live, and 2 of them lost... doesn't give me a great win percentage

But yes, it's a great platform and I have plenty of winning BTC bets elsewhere on Futuur, so all is not lost. I'm a more successful gambler than my entry here suggests!