It may be necessary for developers to make a specialized version of the purse for exchanges.
We need to make a good defense against 51% of the attack. There are different ways: PoS, dPoS and dBFT, PPoKW.
Maybe the issuance of coins of 1 million would be better to divide between the two proofs.
500000 for PoW (ASIC)
500000 for PoS (Masternode)