There are many types of cheats in Grand Theft Auto 5 that can result in easy money for the user.

Users can find money at the bottom of the ocean floor by making their character swim down to the crashed airplane near the hospital. Look for the tail end of the airplane and there will be a white glowing suitcase containing $12,000 right next to it.

After the character has collected the money, save the game and then load up the saved game. This makes the suitcase full of money appear again while still holding onto the $12,000 already collected.

An easier way to collect the money is by switching characters after the first character is right on top of the suitcase. Switch back again and the first character will have a full oxygen tank and the suitcase will respawn.

The suitcase will keep respawning every time the character is switched, allowing the user to quickly amass a lot of money.

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Another method of collecting money fast is to work the Stock Market. The easiest way to do this is by killing the owner of a company through Lester's Assassination Missions. Invest in the company's competitor and then kill the company owner to help drive up the stock of the competitor.

After the kill, make the other characters invest in the competitor. Next, switch to sleep mode at least three or four times to make up to two days go by. The stock prices will increase dramatically and allow the character to sell at a big profit.

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Watch this video for more ways of earning fast money: