Move single stock gains to long holds?

Hi. I’m small time. Trying to build a long hold mostly voo-type growth situation. I have several single stocks that I’ve bought and made pretty good returns on (Covid fire sale or ipo). Since the singles have mostly leveled off, would you sell and reinvest into a more diversified fund for continued growth or just hold all the singles?
For example I’m +$16 on sbux over 5 years and it’s mostly stable so swap for VOO?
Again, small time.

Thanks!