Hmmm, well, it's not like the chips are on fire and are going to melt. What I would do is cash in the small chips and throw the biggies in a safety deposit box for a good year or so. People forget shit, the casino won't, but people will. So, after the long wait, selling them to unsuspecting gamblers at a fraction of the value would be a more viable option. Will a criminal have that kind of patience? Who knows. I honestly think that if this robbery is possible, washing the chips would be too.