I’m guessing that Mel’s thoughts at the time (an perhaps still) was “Meh - I’ve got tons of treasure - what’s a handful of emeralds?”
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.)