Alcazar means in English to reach. So, the money would reach further or you would have more of it if no one steals it. This is one of those tricky words that can be used differently depending on the meaning your trying to give to a sentence. Like , no me puedes alcanzar. Means , you can’t catch me or you can’t reach me. If you say, no me alcanza el dinero, It means, the money is not enough. Good question, hope this helps.