Saving Coins.
It looks very likely that they will work. Myself I'm counting on it since I'm carrying a lot of coins to the next Act.
Forum Discussion
If they don't carry over they will be wasted. But if they do carry over. You will have one heck of a jump start. All casinos use different coins that only work at there casinos. There is a chance that each act will use a different token. Its 50/50 IMO. If they do carry over. I'll be sure to hoard for act III
