The premine was done in blocks 100 through 200 in the amount of 600k each.  For 6% of the PoW coin count.  Continued growth of PoW and PoS through wallet holding and Term Deposits will bring that percentage down gradually as the coin matures and the distribution curve grows.  The coins generated from PoW will eventually be about or less than 25% of the coinbase when you add interest earned PoS coins.  Too many variables about how miners with hold or sell, or will it be the later investors that earn more by Term Deposits?