Required Tools:
Cheat Engine

Steps:
1. Enter Millionaire City [http://apps.facebook.com/millionairecity/]
2. Open Cheat Engine.
3. Select browser in process list.
4. Surround ONE townhouse luxury with coffee houses. This is to ensure that you will not exceed the coins limit and get a game error.
5. Scan 100000 in Cheat Engine
6. A few addresses returned. Select all those that end with 4C and press the red arrow
7. Change all the C to 8 until you find the address with a value of 45
8. Change 45 to 45000.
9. Now wait till your coffee houses can collect $$ and watch as you earn thousands of coins instead of a few hundred. Just set a lot of coffee houses around 1 house and set a mouse recorder to click on the coffee houses and leave it to bot and you will be extremely rich.
10. Watch my video if you are unclear.

I didn't really test out the max limit of coins that you can gain before getting an error, but as shown in my video, $275,400 is a safe number that will 100% save.

not working

MC cheat with cheat engine (CE) 6.0 (open wih google chrome):
1. Open your CE.
2. Open your MC (millionaire city)
3. Find the last plugin google chrome
4. scan 700000
6. find the addres number with xxxxxx224
(scan it when your MC is loading. if you can't found the addres number, please reload)
7. double klik the address number with xxxxxx224
8. change the number with xxxx240
9. you can change the value between 10 to 1000
10. after that you go the page your friend
11. back again to your page
12. see the value your contract

(note : must have decoration of triumph arc or must be to level 26 up)

pa try nga po itong Millionaire City Cheats Thanks po dito ^^