Things are worth what people are willing to pay (or trade) for them. What's a dollar worth? How about a Linden dollar, or WoW gold? What about rare stamps, or collectible coins, or baseball cards? All of those things are objectively worthless, yet they have value because humans imbue them with value.

Economics is like quantum physics: if you claim to understand it, you don't understand it. Let the experiment play out, and caveat emptor.