As a result, interest in the mystery of Satoshi Nakamoto—the creator of bitcoin whose real world identity has remained unknown even as the bitcoin price tops $100,000—has surged, with a HBO documentary last year claiming to have finally unmasked him.

Now, as Tesla billionaire Elon Musk confirms his bitcoin-inspired plans for the U.S. Treasury, a Coinbase executive has claimed Satoshi Nakamoto’s identity may be known by the rival crypto exchange Kraken—as fresh data puts his bitcoin stockpile at a value of over $100 billion.