It's obviously never will can be, it's impossible to do. Until whenever Bitcoin is a currency that is clearly different from the offline currency of the characteristics and its natures, that is only in the internet world (must be online) must be connected with an internet connection. Anything done with bitcoin, never can't to do like as a offline currency that can be transacting without internet.
At present it's not possible to make an transaction with bitcoin same as that we do with the paper money even without any internet connectivity. Here nothing seems to be a complication, because now everywhere internet connectivity is found, which makes transaction with bitcoin same as paper money.