Though it's fun [and educational, too!] to watch the BitCoin phenomenon unfold, in the end, you're absolutely correct.
Just as wealth is created only by the production of tangible goods, a dependable medium of exchange must be tangible, itself.
BitCoin is nothing more than a fancy debit card. It's only worth something so long as it can be exchanged for existing currencies.
That’s economic nonsense. Services create wealth just as well.
/johnny
The wealthiest man currently in the world rode to that position on the back of exactly the same thing that bitcoin is made of: computer code consisting of 0's and 1's. And if you think a bitcoin is easy to come by, please go get yourself a copy of CGminer and start mining them. :-)
Ping me in about 20 years when you've mined a whole bitcoin on your Intel 7 processor based computer.