Mainly because CBOE isn't a new player here. They've been around forever (1973), and are a trusted exchange. The people that have a slight interest in BTC, but are skittish about the methodologies to get onboard will buy in if they're a customer of CBOE.
#crossyourfingers
Isn't a new player in Bitcoin? Oh...isn't a new player in investing...ok.
Yeah, there probably will be some investment in Bitcoin. It might not be overnight though. See, each of the firms offering the futures need to buy a reserve of the asset to cover their trades. That's the inflow this guy is talking about.