Bitcoin will not be used directly as money between merchants and consumers. Different tokens based on bitcoin and backed by bitcoin will be used in competing payment systems where moving bitcoin on the blockchain will be the settlement layer.
I actually agree with this. I see 2 types of "money". One with price stability and goods denomination as its priority which (it necessarily follows) must be inflationary. One for long term store of value which (it necessarily follows) must be deflationary.
I disagree. Why would I as an individual hold anything else than the deflationary kind of money if it is equally easy to store and spend it as the inflationary type. Paper and digital dollars were easier to transact with than gold coins, bitcoin will hopefully be as easy and cheap (if not more) to transact with as digital fiat.
Which type of gold ?
The paper type ? It's available in unlimited supply.
The physical type ? It's un-tradeable in any significant quantity.
Only investment grade physical gold. It is tradeable everywhere!
The margins gold dealers ask are generally quite high.