I think it's a modern Vanitas piece. I thought it was a really powerful statement saying basically, "you can throw all the money at it you want, but you're still going to die."
And then I read somewhere - I think it was The Smart Set, (I'd link but I'm lazy), where they interpret it as saying money is the new religion and you don't need religion anymore or something along those lines. That just seems like a lot of mental gymnastics to me.
Everything we think we see is filtered by what we think, so I guess everything is subjective.