Once all the "free" bitcoins have been mined, the intrinsic value of bitcoin will be the computing power the network is willing to expend in exchange for that c

Once all the "free" bitcoins have been mined, the intrinsic value of bitcoin will be the computing power the network is willing to expend in exchange for that coin as a fee. Quite apart from using it as a store of value, and international payments processing engine, this could in fact be valuable in and of itself for purposes such as document signing and verification, a kind of peer-to-peer twitter[0], and (I guess here Bitcoin bulls speculate) other hitherto unknown uses. The intrinsic value of a bitcoin is therefore proportional to the value of the blockchain itself. [0] Actually, why _don't_ we have a twitter clone based on the blockchain? Doesn't seem to me that it would be too hard to implement. Of course, messages will take 10 minutes on average to send, be immutable and permanent, and throughput would be limited, but at the very least it would have a novelty factor.