FYI, you might not be aware of my Shire Silver cards, which complement bitcoins pretty well. They make everyday use of gold and silver much easier than with traditional bullion products, eliminating the need for any sort of backed notes. [The reason Americans used paper notes during the gold standard era was because using traditional bullion is a pain.]
But to address your concerns about the supposed need for flexibility in the currency market, the exchanges and market price will alleviate most such concerns, and layers on top of the base currencies will handle the rest. To explain, you can think of bitcoins as being the M1, and things like Ripple can build the M2/M3 supply.
Its good to see you here. Shire Silver is a very nice bullion product, and I support it. We should do some trades for the New Liberty Dollars.
And I agree with your point on the Standard being the problems. There were many different gold standards.
I think what our interlocutor is looking at is the Gold Price Standard, and working to understand it.
The question 1) Why buy gold if the price is attempting to be fixed. It is a durable, stable, store of value.
Your house can burn down and your gold will still be there if the firefighters didn't steal it. You paper money will be gone. Your hard drive may be destroyed, but the gold wire in your Shire Silver card will remain, and can be extracted from the residue.
The second question of a "moving desired price" is essentially what we have today. Gold price is heavily manipulated by central banking. It has some free-market elements, but since is it traded for a controlled commodity (fiat currencies), it can be the victim of trading manipulations.
There have been some very extensive publication on this matter by the Gold Anti-Trust Association (Gata.org)