There will definetly come a day when you wont need to. Just this summer over a quarter million stores in Japan began accepting bitcoin.
I can guarantee with that many stores, all your necessities would be covered. Now the issue is, its hard giving up bitcoin for goods in the respect that bitcoin is a commodity with an ever increasing value. It would be interesting to see what happens if a society only uses a currency that increases rather than decreases in value.
It seems that it may stifle purchasing.