Declining earnings haven't scared billionaire investors away from this stock.Dividend stocks aren't just for folks who want to build up a stream of passive income. Billionaire investors who don't need any more income to retire comfortably regularly invest in businesses that pay dividends because they tend to outperform their non-dividend-paying cousins over time.Non-dividend-paying stocks in the S&P 500 index produced an average annual return of just 4.27% during the 50 years between 1973 and 2023. Dividend ...