Mark Eglinton, a writer co-authoring a book with McAfee, told The Daily Mail that the former millionaire "blew his $100 million fortune on 'bizarre' mansions and really was broke when he died in a Spanish prison" in June 2021. A week before his death, McAfee tweeted about his financial situation.

"The U.S. believes I have hidden crypto. I wish I did but it has dissolved through the many hands of Team McAfee (your belief is not required), and my remaining assets are all seized." He went on to say, "I have nothing. Yet, I regret nothing."

In conversations with McAfee, Mark learned where a great deal of his money went. Throughout his life McAfee, owned "large mansions and compounds in Belize, Texas, Colorado, Hawaii, and Tennessee, among other locations," some of which were sold at a tremendous loss because of the 2008 recession. His main home in Woodland Park, Colo. was at one point worth over $25 million but sold for a scant $5.72 million in 2007.

McAfee also said that $100 million can go fast, but that probably isn't true for most people.

Unfortunately, McAfee couldn't even scrape together what was needed to pay Mark, who was in the process of writing No Domain: The John McAfee Tapes. Evidently the book was documenting Mark's "extensive interviews with the outlaw." He's planning on finishing the book on his own and feels no ill will towards McAfee. "I don't doubt that if he could have helped, he would have," said Mark.