In March the Securities and Exchange Commission denied approval for a Bitcoin ETF by the Winklevoss twins because they said too many bitcoin markets were unregulated; with recent futures markets at the CBOE and CME starting there is new hope for ETF approvals; previous filings for ETFs are now being refilled and newer ETFs are being filed as recently as late last week; there has been similar products in Canada and Switzerland with both trading at premiums. Source.