One of the United Kingdom royal family’s most prominent members believes blockchain is an interesting development, according to candid comments he gave during a meet and greet on May 7.

While visiting Berlin, Prince Charles engaged with spectators outside the Brandenburg Gate, at one point responding to a question from a cryptocurrency Twitter community member.

“What do you think about bitcoins? Blockchain, bitcoins, cryptocurrency?” the fan asked Charles, who at first appeared confused.

Afterwards, he seemed to remember that he was aware of the technology, and then he responded:

“Blockchain...very interesting development.”

While the U.K. government has taken a conservative stance on cryptocurrency that has been interpreted as negative, the royals have so far remained quieter about the phenomenon.

Other high-profile establishment figures are becoming more vocal. As Cointelegraph reported, one of the country’s most senior lawyers delivered a speech last week in which he suggested the ubiquity of both crypto and smart contracts was inevitable.

“Thus far, the legal uncertainty that pervades the use of so-called crypto currencies and cryptoassets for financial transactions has meant that the starting line has not been crossed,” Sir Geoffery Vos, Chancellor of the High Court, said. Vos also stated: