Facebook Inc.’s (FB) vice president of messenger products, David Marcus, has joined the board of cryptocurrency brokerage and exchange Coinbase. In a Medium post announcing his move, Marcus said he was convinced that Coinbase had the “the potential to materially change the lives of people around the world.”

Marcus is the second major appointment for the San Francisco-based company in less than a month. It hired Asiff Hirji as president and chief operating officer on December 1. Hirji previously held the same position at prominent brokerage house TD Ameritrade.

Like Hirji, Marcus also brings extensive experience from the financial services industry to Coinbase. He previously held a senior management position with Paypal Holdings Inc. (PYPL) and was the chief executive officer of a mobile payments startup which was acquired by the company. (See also: Coinbase: What Is It And How Do You Use It?)

“David brings firsthand knowledge of building impactful, trusted mobile-first products at scale,” stated Coinbase CEO Brian Armstrong. The combined experience of both veterans from the payments industry should help Coinbase with scaling its operations. The media frenzy has pushed cryptocurrencies into everyday conversation, and the site is witnessing a surge of new users interested in storing their coins or trading cryptocurrencies. For example, it added 100,000 new users over the weekend. (See also: Coinbase Has More Users Than Schwab.) 

The new users have added to Coinbase's operational complexity and volumes. In a Bloomberg interview, CEO Brian Armstrong provided a glimpse into the growing scale of its operations. According to him, the company has increased the number of its customer service agents this year to 220 from 40 and plans to add another 400 next year. Trading volumes on the site have gone up by eight times since June, he said. 

But those increases have resulted in a series of embarrassing outages during spikes in trading activity. For example, Coinbase was down yesterday after a surge in trading activity for litecoin and ethereum. “We are not serving our customers to the level they deserve at the moment and that’s really frustrating,” Armstrong said. The Internal Revenue Service (IRS) has added to those problems by demanding a list of its customers, who, according to the agency, are evading taxation on profits from their cryptocurrency trades. 

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