Don't forget about your vault! If you don't have enough space to keep your money safe, you won't be able to accumulate more than a certain quantity (you will start with a 10,000 limit). You can tap directly on the vault or on the stats button (upper-right corner icons), and there you will see the price and requirements to expand its capacity.
**A specific requirement is bringing some confusion when the vault limit needs to be upgraded up to level 4. Please notice that it states that you must open a third traffic ticket office, NOT to rank up an office up to level 3.
Every player can expand the vault without spending real money. If you still can't upgrade it, please re-read the pending requirements!
