Coinbase has appointed former PayPal and Facebook executive David Marcus to its board of directors as the second high-profile hire in a week.

In a dedicated blog post Tuesday, CEO Brian Armstrong said Marcus’ “knowledge of both the payments and mobile space” was what would help “guide” the largest US Bitcoin exchange and wallet provider going forward.

“David’s perspective and experience in bringing innovative and impactful products to market will be invaluable to Coinbase as we grow,” he explained.

Growth at Coinbase has become no laughing matter this year as the company goes through a second hyper adoption phase which sees its infrastructure and personnel stretched to the max.

The sheer interest in Bitcoin from mainstream consumers continues to test what Bitcoin’s more well-known names can withstand in terms of demand, with Coinbase unveiling huge numbers of support staff this month.

Commenting on his appointment, Marcus stated he had been “fascinated” by cryptocurrency for five years.

“I’m convinced that what the company is working on has the potential to materially change the lives of people around the world, and I’m looking forward to working with Coinbase and its leadership team to help make this vision a reality,” he added.

Last week, Coinbase revealed its new COO in the form of Asiff Hirji, formerly part of the wallet’s venture capital partner Andreessen Horowitz, as well as pro-Bitcoin Saxo Bank and Bain Capital.