A safe is a classic hiding spot for cash, and for good reason. It's a secure and out-of-the-way place to keep your money, and it's less likely to be discovered by burglars or other intruders.
The refrigerator is another common hiding spot for cash. It's a place that people don't typically look for valuables, and it's also relatively cool and dry, which can help to protect your money from damage.
A suitcase can be a good hiding spot for cash if you're traveling or if you need to keep your money out of the house for a while. Just make sure to choose a suitcase that's not too obvious, and keep it in a safe place.
A closet is another common hiding spot for cash. It's a place that's typically filled with clothes and other belongings, which can help to conceal your money.
A water tank is a less common hiding spot for cash, but it can be a good option if you need a place that's watertight and fireproof. Just make sure to choose a tank that's not in use, and be careful not to damage the tank when placing your money inside.