When bitcoin price hits 10,000$, Perhaps we will not use traditional currency (cash).
Untill that time, we will be using smart devices to pay everything with bitcoin.
yes i can also hope so, but still it do not look like so, because bitcoin is not yet used by all the people of the world and most of the people of the world still depend on fiat and those people who are using bitcoin they also use it as secondary option and the as primary.