'More to come' after bitcoin futures launch: Cboe CEO

The generally smooth launch of bitcoin futures on Cboe Global Marketscould pave the way for other cryptocurrency-related products like options and ETFs, the head of the exchange operator said in an interview on Monday.It may take U.S. regulators a bit longer to warm to the idea of a proliferation of products and securities related to digital currencies, but Cboe Chief Executive Ed Tilly said this weekend's debut should support progress toward that.Chicago-based Cboe operates markets in options,