Re: Will Gold and Silver lose all its speculative value to Bitcoin?
And a private key cannot be made tangible? 
A private key to what? There's no electricity, thus no network.
All of Bitcoin's rules require math only and no electricity. As I said, it's impossible to place transactions in blocks without electricity. However this is always impossible with gold. So, without electricity, Bitcoin will merely fall back to the less efficient solution used by gold. I don't think I can spell it out even more.