Do you have to lay property cards down in monopoly deal or can you hold them as long as you do not exceed 7 cards?

In Monopoly Deal, players can choose to hold onto property cards in their hand without laying them down, as long as they do not exceed the hand limit of seven cards. However, laying down properties is essential for forming complete sets and winning the game. Players can strategically decide when to play their cards based on their game plan and the actions of their opponents.