Charles said: "If someone codes a Proof of Stake sub-currency then people can use Ether to buy that sub-currency." <- BTC could be used to buy in with the POS currency as well. In which way is the POS currency in this example tight to Ethereum? How do the contracts come in play here?
This is because a new currency is instantiated through a contract on the ethereum blockchain if i am not mistaken. The details of some contract implementations are in the whitepaper.
What exactly does "instantiated" mean? What advantages do you have from it as a POS developer? In which way can you use the Ethereum base layer here?