As we get close too the experation of the 20pct bonus period we should see an increase in burning and as rat 4 releases more info on black net burning of black will accelerate
Proof of stake as dapp. Its value is in providing consensus to dapps.
The most popular type of dapp that requires consensus is cryptocurrency. Non-currency dapps also can use consensus, for example
https://en.wikipedia.org/wiki/CryptoKitties