I did a trial deposit of 100$ in gold coins at the mandalay bay yesterday and imho its simply not worth it. It didnt take too long but instead of giving cash like they did at the bank, they go to the back and put in the coin counter and give chips. Ive heard of reports where coin counters dont work so what would you do then...its simply to much work for only a couple miles. Hopefully others can find better ways of geting miles in vegas than i have