Welcome to the Proof of Stake Community
A Proof of Stake consensus model will not only be an economical advancement by increasing transaction speed and reducing fees, it will also be an ecological advancement by lowering the excessive energy consumption used by Proof of Work mining.
Everyone knows the magic of compounding interest, where you’re earning interest (say, for letting a bank use your money), then earning interest on that interest. As the interest accumulates, it gets automatically reinvested, and earns even more interest.