Blockchain and cryptocurrency are two entirely different things. One is an actual means of payment and the other is the platform for which makes it work. We certainly might get to the point of insurance companies insuring actual "dollars" tied directly to crytpocurrency but that day has not come yet.
I feel there's an inevitability about the fact this will happen. People are able to insure their dollars or other currencies and so it's logical it will arise for cryptocurrencies too. I do not know exactly what shape that will take and the restrictions around it but as long as there is a demand for it then insurance providers will create the policies.