Bitcoin supports reversible transaction, if you don't trust the vendor, it's not that hard to use a trusted escrow service.

I agree bitcoin does have its flaws, economically bitcoin behaves like a commodity, which might hinder consumer adoption. There are ways to get around that, you could potentially issue a anonymous currency of sorts backed by bitcoin, with a fixed exchange change rate. So, the prices could remain relatively stable. May be that could drive consumer adoption.

TBH, I don't know what bitcoin is going to look like in the next 10 years. It's like the internet all over again. Just like the internet, bitcoin value doesn't necessarily come from the underlying utility as a transaction platform or in case of the internet TCP/IP, but from its distributed , permissionless and decentralized nature of governance. We know for a fact, that's what drives innovation.