August 2019
Anyone else get their cash capped today? Mine got locked down at a completely arbitrary looking number. I was hoping to make it to 5 billion in the next few weeks, but now it's just stopped at 4.2 billion. Sure I spend some when I have to, every time I send characters on missions and for whatever's necessary to keep the game moving, but it all comes back in no time at all.
I wonder if they'll ever release another Road to Riches item. Seems like there's a final slot available "coming soon".
August 2019
The maximum amount is 4.2bn.
https://forums.ea.com/en/the-simpsons-tapped-out/discussion/90074/tips-for-players/p1