The bitcoin protocol makes an assumption: That the value of a Bitcoin is inherently limited by the cost of electricity used to generate it. What if you found a very large, largely untapped source of electricity? What if you installed a supercomputing cluster near your shiny new Gigawatt solar plant?
I disagree, and it has been discussed and rehashed many times.
The assumption that you are posing is backwards. It's not the cost of electricity that determines the value of Bitcoin, it's the value of Bitcoin vs. the cost of electricity that determines whether people will find it economically beneficial to run the verification program (i.e. Mining).
As people find new sources of energy, and lower cost computational capabilities, it becomes more economically beneficial to perform mining. So more people will mine until it's not really all that beneficial due to competition. And more miners (i.e. verifiers) means that the system is stronger, not weaker.
