https://news.ycombinator.com/item?id=6786416 from 30 minutes ago.

Here’s who (probably) did that massive $150,000,000 Bitcoin transaction (washingtonpost.com)

From the article: "Who was responsible for the transaction? I asked Sarah Meiklejohn, a computer scientist at the University of California, San Diego, for her thoughts. She's the author of a recent paper demonstrating that sophisticated analysis can reveal a lot of information about who is responsible for Bitcoin transactions. She has combined a large database of Bitcoin addresses tagged with their likely owners."

Link to the paper is provided.

When it is such a large amount of money, it is not all that difficult. Just look for the guy who is $147M richer.

In other words, the only way you get to have the money is if you never spend it, except in minuscule amounts.

Case in point: Supposedly the money from a lot of cases of major Bitcoin theft is still sitting in the same wallets. Implication: The thieves are having a hard time figuring out how to spend the money without outing themselves.