1. we can buy goods with bitcoin at all stores
2. bitcoin become a recognized national currency
(i hope so)
And also bitcoin be a value storage. You buy bitcoin to hedge against inflation. The value will not reduce over time.
It will take a long time to get accepted at all stores as a mode of payment, but yes the value of bitcoins will keep on going higher and higher in coming years, as the adoption level would be high, we believe that the price would be more stable,though it is not sure that price will be definitely stable, but if the adoption level and acceptance level goes high then the future of bitcoins would be definitely bright.
I would not be so sure. The future may be very close. The world is changing very quickly. I suggest you read this article:
https://www.cryptocoinsnews.com/coinbase-launches-first-bitcoin-debit-card-u-s/
Well if you are only basing your answer to that bolded part of yours with that services that recently launched then still you can't say future for most of the stores that will accept bitcoin may be very close.
FYI, it's not worldwide. Another one is bitcoin regulation in some countries. It may happen but not close for now. Maybe in 5 to 10 years.