If you are not careful, you would _____ your money?
Answer Details
The correct option is "lose". The sentence is warning the listener that if they are not careful, they will lose their money. "Lose" means to fail to keep something, especially when you had it before, which is what the sentence is implying. "Loss" is a noun that refers to the act of losing or the state of no longer having something. "Loose" means not tight or free from constraint, and "lost" is the past tense of "lose".