It's the most expensive piece of Titanic memorabilia ever sold.Courtesy of Henry Aldridge & Son LtdFTX's former head of Europe bought the most expensive Titanic relic ever auctioned.The gold watch sold for $1.5 million, and belonged to John Jacob Astor IV. Gruhn bought the timepiece for $1.5 million, and plans to exhibit it in US museums, he told the WSJ.The buyer of a gold-plated pocket watch owned by a wealthy Titanic passenger has been identified as former FTX executive Patrick Gruhn.The timepiece sold at auction Saturday for roughly $1.5 million, the highest price a piece of Titanic memorabilia has ever fetched.Gruhn is a German crypto law veteran who formerly served as the head of FTX Europe.