It is very likely that this is exactly what will happen and we are unlikely to see rapid growth in the beginning or middle of next year, perhaps even so that growth will begin no earlier than 2020!
We have to hope for the better time and not only hipe but we all know that ICE will list Bitcoin on 24th January because of which the price of Bitcoin will rise much higher then we will not need any ETF as it works the same which ETF will do.