I can't let you go to Las Vegas for the weekend. If you go to Las Vegas, you'll end up playing blackjack and losing all of your money. Then you'll be stuck there with no money, living on the streets and panhandling just to get enough money to buy food. You don't want that to happen. Above Passage commits a fallacy ; specially, it commit a false cause fallacy.

The passage commits a fallacy and specifically commits a false cause fallacy

Explanation:

A fallacy is a sort of faulty reasoning that makes a faulty argument. A fallacy usually denoted an error in logical form of an argument, it could also be formal or informal.

A fallacy of false cause is a kind of fallacy that makes a wrong conclusion from a premise that is usually arbitrary or imaginary. Example, how can the speaker above be so sure that the individual going to Las Vegas would end up exactly the way he had said it.

when your a dog and you need a bone.   go and eat a rabbit