Bitcoin's inception is full of mysteries, with no current identity for its maker — with exception to the well-known pseudonym, "Satoshi Nakamoto". Satoshi could be a single person or a group of people, it is all left to speculation for now. It is estimated that Satoshi has around 1 million Bitcoins, currently valued at $11.2 billion USD.
The $10 billion lawsuit that we're seeing today involves two men primarily, a developer by the name of Dave Kleiman (whose family has initiated the pending lawsuit) and Craig Wright, a man who claimed to be Bitcoin's original creator in early 2016. The lawsuit is for 1,100,111 bitcoins which is worth well over $10 billion based on the current market.
The lawsuit is being filed on behalf of Dave's brother, Ira Kleiman. Dave Kleiman died in 2013 from illness related complications. The suit claims that both Kleiman and Wright mined bitcoins together early on in Bitcoin's cycle, and alleges that Wright is scheming to "seize" Dave's bitcoins. The suit was filed on February 14th of this year, and is not limited to the 1 million bitcoins; intellectual property relating to the Bitcoin software itself is also being sought in the lawsuit. One of the lawyers who filed the suit believes that it doesn't matter whether or not one of them is Satoshi. He goes on to explain:
All that matters is what is clear from Craig's admissions and evidence and emails: That they were involved in Bitcoin mining from the inception of Bitcoin or very shortly thereafter.
Within the lawsuit are claims that both Wright and Kleiman were communicating in March 2008, with Dave telling his brother that he was creating a digital currency the following year. The first bitcoin transaction took place on January 12th, 2009, just days after the first block was created. The timeline suggests that both parties may have indeed been involved very early in Bitcoin's existence.