Can you not gamble with a credit card in vegas? It looks like the person in your example was selling a call, which has potentially unlimited losses - that was

Can you not gamble with a credit card in vegas? It looks like the person in your example was selling a call, which has potentially unlimited losses - that was a rather poor decision on his part. There are much safer methods of making "the same bet". Gambling is a random game designed to extract money from people. The stock market is a math game that doesn't care if you gain or lose.