Okay - a quick search said Fisher had a net worth of $100 million. Although he died in 1998! (That long ago!!!???)
You may not be able to take it with you, but what a fun adventure along the way! (Well, except for the legal stuff.)
And according to wikipedia, adventure still awaits:
The wealthiest part of the ship, the stern castle, is yet to be found.[4] Still missing are 300 silver bars and 8 bronze cannons, among other things.
The site of the wreckage of the Atocha, called “The Bank of Spain”, (a sandy area 22 feet deep and within 200 yards of the anchor location),[5] is still being worked on and treasures are slowly being recovered.
IIRC he went bankrupt a couple of times and the locals were pretty hard on him for years. He persevered, but it was a tough line for Mel.