We should try to increase our usage of BTC, in our daily transactions. It is the only way we can really come to trust this new technology and dump CCs.
Random idea:
On your next purchase on an e-commerce website accepting btc, buy bitcoins and use them instantly. Like a reverse bitpay.
What do you think of it as an actual business?
I think it goes without saying that every bitcoin "hoarder" seeks merchants accepting bitcoin and uses bitcoin wherever possible. But artificially trying to increase volume? That will never work. Just have patience, it will all come.
As for buyback feature, check out coinbase, they offer you to refill your spent bitcoins when you've completed BTC purchase. Probably others do that as well. But I still think it is silly, because I spend bitcoin when it is expensive or stable, and buy in bulk cheaply when everybody panics for some new stupid reason. That gives me an actual and quite significant discount when buying things with bitcoin.