Few days ago a friend asked me this questions. But i cannot understanding that how to i give him answer. At last i said him that, bitcoin is an online currency. Only this currency used in online marketplaces. It is not possible to use it in offline marketplace like offline currency.
But what is your best answer of this question?
It depends on what do you mean, if you mean to use bitcoin everywhere similar to the way you use fiat then that is going to be possible in the future when the LN is working however if you mean using bitcoin without the internet that is going to be next to impossible we need the internet so the miners know about your transactions and can confirm it in a block.