The statute of limitations expires in 7 years, after which you get to keep the gold, even if you robbed bars of gold bullion out of the U.S. Government repository at Fort Knox, so long as you can prove you remained in the jurisdiction for the full 7 years.
Tell that to the people that were stupid enough to send their 10 1933 St Gaudens to the treasury for “verification”...
https://www.fas.org/sgp/crs/misc/RL31253.pdf
The above link goes to a pdf document describing the federal statute of limitations and listing the various time limitations. I think the longest time is 20 years for a major art theft. All the others are less except for terrorism, various types of murder, and sex trafficking in children, nuclear weapons, biological weapons; these sorts of crimes have no statute of limitations. I did not read the statute in great detail but the only reference to banks and financial institutions involved murder during the commission of the robbery. I think they are home free. Please note, as always. free legal opinions are worth what you paid for them