In February 2018, Forbes magazine reported that Mellon's $2 million investment in the cryptocurrency XRP turned into a $1 billion fortune.

[10] He also had a daughter whom he raised jointly with his former wife, Tamara Mellon, the co-founder of shoe company Jimmy Choo.

"[13] At the end of 2017, Mellon moved from New York to Los Angeles, renting a house in the Hollywood Hills for $150,000 a month.

[14] Mellon died in April 2018 in Cancun, Mexico, where he was planning to check into the Clear Sky Recovery clinic, which specializes in therapy utilising ibogaine, a medication with psychedelic properties.

However, he was reported to have died in a hotel room in Cancun before arrival at the clinic, suffering a fatal heart attack after taking ayahuasca, a hallucinogenic drink.