The greatest shareholdings are only those which continue to earn for you while your attention is away from them also even if they do not grow your wealth that crazily high like any momentum stock does more often than not.
But would any sane person ever employ a cook who can prepare very tasty dishes but habitually steals something and is planning to poison the family to run away with everything in the house so the owners of the house have to keep an eye on his every move almost constantly to enjoy crazily tasty dishes for a very short period of time till an early death?
Universal answer to that must obviously be no so you must imply the same wisdom over many great growing stocks also if they cannot just keep growing without your keeping an eye over them almost constantly.