get out while the getting's good

verb2

1. •
   (informal) To leave at an opportune time or before adverse conditions arise.

   • Take your choice; get out while the getting's good, or we'll boom Glad-hand by starting a Boot Hill right here." A Boot Hill! Grinch reflected. — 1912
2. •
   (informal) To sell all or part of one's holdings in stocks, real estate, a business, etc. while conditions are good, particularly in anticipation of a drop in prices.

   • It costs pretty near as much to sell a used truck as a new one and there is usually ... close down business right away and get out while the getting's good. — 1924