Will we need currencies?

Short answer: NO

Currencies generate inequality, poverty, human security problems, and empowerment.

Under servicecracy, everyone has their needs covered without needing any money. People will go to the supermarket or any other place that distribute goods, and they will take what they need, no more. Everything will always be available, there is no need for accumulation.

People working in distribution centers/markets love helping others to get what they need.

When you get what you need, you don't need any money, money will become something that was useful in past dark ages.