Pew Research:

Americans are becoming less reliant on physical currency. Roughly three-in-ten U.S. adults (29%) say they make no purchases using cash during a typical week, up slightly from 24% in 2015. And the share who say that all or almost all of their weekly purchases are made using cash has modestly decreased, from 24% in 2015 to 18% today, according to a new Pew Research Center survey.

As more Americans are going cash-free, a growing share of the public is comfortable being without physical currency. Today, 53% of Americans say they try to make sure they always have cash on hand just in case they need it. That represents a 7-percentage-point decline from the 60% who reported this in 2015.

Even when I have money, I rarely, if ever, use cash to purchase things.