Never, never, never, never give up.
While you could cash out every investment as soon as it's ready and walk away with money in hand, you could also choose to acquire the company instead.
When you acquire a company, you won't receive your investment value, and your acquisition won't initially be worth anything at all. Do your best to
minimize expenses through tactical rebalancing of human capital, though, and your acquisition may eventually be worth more than your investment ever was.
Keep in mind that any workers you hire to help with your corporate outplacing will be paid from the Net Value of your acquisition, not your Current Cash in Hand. In other words, the leaner you run, the greater your acquisition's value will be in the end.