Monopoly Go: How to know when to stop, and use the multiplier wisely.

See the full playlist here:    • Monopoly Go Strategies: Legitimate al...  

It is generally a good idea to stop playing for a bit (e.g. till just before or after the tournament completes) in the following situations:
1. You complete the tournament rewards, are well into first in the tournament, and the current event reward (top) isn't good - e.g. money after obtaining many points.
2. There are no good events happening (on the right hand side) - e.g. wheel boost, free parking with dice, mega heist.

I usually at least collect my daily rewards even if it isn't a good time to play.

Use the roll multiplier when 7 away from your target (e.g. rail road) to where you will get the prize you are trying to get in the event bar, or tournament, or max it if trying to win more the tournament or more prizes.