how did that happen?

So I haven't bought anything big for a while, but I was just checking my bank account, and found that I have a total of about 5 million marapoints, almost the most mp I've ever had. I thought I still had around 3 mil, but i guess I've been earning/ saving more than i thought. I don't really have anything in mind that i want to buy, so I guess I'm going for 6 mil!