One reason for the shift away from paper, financial advice website NerdWallet experts speculate, is the growing use of person-to-person payment apps, like Venmo, that allow users to digitally swap funds.
Another reason: e-commerce in general. "Rather than going to the grocery store and paying with cash, for example," NerdWallet says, "people now order groceries online and pay electronically. These trends, combined with the now-widespread use of debit [and credit] cards, have made carrying cash a rarity for many."
In fact, when given a choice between paying someone with cash or with an app, the survey found 47 percent of respondents would choose the digital option.
By generation, not surprisingly, millennials most prefer going online: 49 percent say they have made virtual payments compared to 44 percent of those in Generation X and 32 percent of baby boomers.
And 48 percent of men have used payment apps in the last six months versus 38 percent of women.