Yes . The steps in the adoption of a succesfull money are 1. Store of value 2. medium of exchange 3. Unit of account. Bitcoin can do all 3 perfectly but it will be adopted based upon store of value because that is what most of the world needs most. We already have mediums of echange and units of account. When people store their value in bitcoin, the other moneys fail, then bitcoin setves as a medium of exchange and unit of account.
Discussion
I hope this is how it unfolds.
I use bitcoin as a medium of exchange wherever it is accepted and i bug my hr department to pay me in bitcoin. But it is far to early for me to use it as a ubit of acount because i cannot fathom its true and ultimate value, i can only say: the world /21m btc.
Yes, I make it a habit to ask any retailer if they accept bitcoin. This is my ongoing individual attempt to increase adoption but yes volatility is an issue too which affects adoption as a currency - this will hopefully stabilise in time.