Where is there a market for futures on cryptocoins?
BitMEX, CBOE, Deribit, and others all offer bitcoin futures, with new exchanges appearing all the time.
The Chicago Mercantile Exchange says they'll start trading Bitcoin futures by year-end.
After the announcement, the price dropped to $1, and has since rebounded to $200.
https://imgur.com/a/XOvWS
Maybe the $1000 BT2 price wasn't really a bet on free money, but on the prospect that BT2 might replace BTC.
If the expectation was that post-fork BTC + BT2 ~= today's BTC, that means that today's BTC price was depressed by this possibility.
Now that BT2 is cancelled, the value flows back to BTC.