I lost the 20x multiplier, how do I get it back?

Multipliers are based on how many rolls you have available, the more rolls the higher the multiplier possible, get more rolls and your 20 multiplier will come back

You have to get more dice, I think 1000 dice rolls or more will get a x20 multiplier, but I’m not 100% sure.

X20 multiplier is 300 dices

I've got dice rolls 845/70 and my multipler has dropped to x1 from x20. Therefore my earnings have dropped significantly and takes forever to earn a couple of million. With property prices now being 18-19 million per build, it's impossible to progress. I'm on board 57 Catfe so builds are expensive. A once enjoyable game has been ruined by the multipler dropping to nothing.