Or even fork off the existing block chain at a pre-determined block. This way, all existing owners of the parent crypto currency would have equal coin-to-coin

Or even fork off the existing block chain at a pre-determined block. This way, all existing owners of the parent crypto currency would have equal coin-to-coin values in the new crypto currency as of a certain date. I'm surprised I haven't heard of any existing alternate crypto currencies intentionally forking off of the existing Bitcoin block chain. They all seem to start off with their own new block chains.