He meant this is the last of the money he saved from all the bribes he has taken.
Let's look at it from a practical standpoint.
1. You're going to keep $480,000 in cash and gold in your home. What if you had a house fire?
2. What if someone broke into your home?
3. Who would keep almost 500,000 in your home and not get one penny in interest unless you had something to cover up?
This guy, like the last time, is lying through his teeth. Then, to add insult to injury, he announced he's going to run again!