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Bitcoin the "protocol/technology" in your analogy would be tcp/ip. To my knowledge, no one made a fortune buying "shares of internet."
I am sure many ISP provides made good money selling Internet to the people...
Yes, just like I'm sure many exchanges made good money selling you Bitcoin. I'm not suggesting that no one profits from the internet, just that the value of bitcoin (the unit of account) is not the same as the value of the technology.
@stefanf: I agree with you, but there's nothing to suggest that today's BTC price reflects the value of the technology. There's even less to suggest that the price would rise.
Solving a block must be rewarded for people to continue mining, but there's no reason for the reward to be high if the network's total worth (the profit which could be had by compromising it, etc.) is low.