Is there Price-of-currency Betting at any site? Like it was Bitcoin Betting at btc-e (bitcoin isn't principled for me). Help me find it, please.
Yes, Onehash have it but you need to be very careful betting there.
Site is OK. But they use mutual betting odds calculation, so every bet is changing the odds until the very last second.
Just look it, read the FAQ and watch one market from few hours behind to it's closure.
They only allow you to bet small with that kind of betting and once you win they'll take a fee from your payout which is not good for a small bet. It's only worth it to bet there when the odds are higher than most sportsbook.
has a price prediction for bitcoin. I don't know if this is the correct one you're looking for but they have a jackpot though.