Until the tax bill comes. I heard most people take the cash value, because they can’t afford the taxes on the prize, or the prize isn’t worth what the tax requirements would be to them.
A looong time ago my grandpa won a patio set. He ended up suing whoever he won it from for what the taxes were, arguing that the taxes were more expensive than a patio set he would have realistically bought. At least that’s the story I heard.