If you happen to win a decent sum of money, you can ask the casino to hold your winnings in its safe or to pay you with a check. Don’t go walking around Las Vegas with a tonne of cash on you. You may be proud of yourself and be rushing off to go spend it but that’s how you get mugged and lose everything. If you insist on taking all your money in cash, you can ask the casino security to escort you to your car or room. In Vegas, that is the level of customer service you can get.