I'm very interested by this subject but I thought I'd never get through to the end, not the easiest of reads.  I've worked in the insurance industry for a long time and I can promise you one thing,  if they see a new opportunity to make money they are going to go after it.  However you mention that AIG has already started insuring cryptocurrency but that's not true  ( http://bitcoinist.com/aig-blockchain-insurance-policy/ ).  

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.