PayPal recently predicted that more than 17 million P2P transactions will occur during the month of December, as consumers – particularly millennials – pool money for gifts and use P2P payment apps to collect payment from each other.

According to the company’s Holiday Money Habits Study, an online survey of 1,000 American consumers released this week, half of millennials planned to go in on gifts together this holiday season compared to two-fifths of consumers in general.