Late reply, but from my perspective, money is a wealth object. (so are information, knowledge, personal network, name value, skills, and etceterum). wealth is about ability to change the world around you. Money's certianly easier to transfer around, as it is a medium of exchange, but information is the wealth of facebook. The money's just what it can easiest get in exchange. (it could ask for lumber, or any other commodity or service....)
That's a core point I try to raise in a lot of these discussions; that money isn't anything but something to exchange for -other- things.
The point of owning money is to exchange it for something...and outside of an equity market discussion, one shouldn't really look to have more than they need in the slimmest instance...but that becomes difficult.