The ROI is fantastic.
Is it possible that the number of people saying that bitcoin is a bubble is so high because bitcoin is a bubble? I mean, I'm not sure how anyone could even deny that bitcoin is a bubble -- the best you can hope for is that like gold it's a bubble that never ends. There's only been one of those in human history, though (two if you count silver as well), and it has at least a seven thousand year head start on bitcoin.
Anyway, my response to your comic is this:
http://projectomniscience.blogspot.com/2011/05/aardvarks.htm...
I wrote the strip, or at least the concept. I commissioned it from an artist called Joey Dangerous and pay the guy in bitcoin.
It does seem to need a punchline. Perhaps a zoom out to a larger group of people saying "Bitcoin Rally!" sitting on piles of Bitcoins that they're compulsively counting.
Is bitcoin a bubble? Not from what I seen concerning economic activities and what users report about themselves.
But can bitcoin fail? Yes. Is it 100% likely to fail? I think not. Is it a good idea to put in a few dollars as a hedge? Yes.
That being said, I am in bitcoin for the long haul, whether or not it ultimately fails, and possibly consequently lose all the value in bitcoin.
Well, they'll say, was only a few dollars.
Ultimately though, you've got got to wonder where all those few dollars went.