Yes, Shawtay, before we were allowed to have 1kkk, but now for sure we can have up to 1kkkk. Maybe we can store even more, but since no one ever got that much money, we cannot know.
On the other side, since you buy any market item with the gold stored on your bank account, since an item can be sell now for 1kkkk, we know that at least this amount we can store in our bank account.