The CEO of the world’s largest asset manager sees “huge opportunities” for cryptocurrencies – but argues that work needs to be done before they become more widely accepted.

In a new interview with Bloomberg TV, BlackRock chief Larry Fink said that he’s a “big believer”, but that the current market today is primarily focused on speculation. His comments come months after the firm’s chief strategist said that, to him, the cryptocurrency market charts at the time looked “pretty scary.”

Fink said in the interview:

“Related to cryptocurrencies, I’m a big believer in the potential of what a cryptocurrency can do. You see huge opportunities, but what we’re talking about today, it’s much more of a speculative platform, people are speculating on it.”

Read more: Coindesk