"Top" companies can seemingly do no wrong during their ascent. Whether filtered by top US companies by market cap or fastest growing over the last decade, these companies tend to be household names with a ton of caché. Right now, the top US company by market cap is Apple (NASDAQ:AAPL). The fastest growing for the last decade (2010s) is Netflix (NASDAQ:NFLX). Some of the luster has already caught up to Netflix as competitors have filled the gap. Apple, though, still seems to dominate. Will that be the case in five years? 10 years? When a fifty-something is ready to...