According to the heirs of one David Kleiman, he co-created the Bitcoin protocol together with another programmer, Craig Wright, and is entitled to half of the one million bitcoins their partnership created. They have filed a lawsuit against Mr. Wright in Florida to prove the collective is behind the pseudonym Satoshi Nakamoto that allegedly has access to the bitcoins in question, now worth north of US$60 billion.
https://www.notebookcheck.net/A-lawsuit-may-finally-reveal-who-is-Satoshi-Nakamoto-the-alleged-inventor-of-Bitcoin.579182.0.html
Correction: it's "Mr. Kleiman" instead of "Mr. Klein".