You can’t hope to buy a stock and expect it to grow forever. The National Bureau of Economic Research would need to fire all staff if every public company rose indefinitely.
There’s competition, there’re lawsuits, and there’re takeovers.
People subconsciously link holding stocks “forever” to reducing investment risk. Stocks don’t always grow. They also plunge and fail to come back.
Warren’s investments grow because he has insider information. His son served on Coca-Cola’s Board of Directors for six years. There’s no way Warren is losing his $23,8 billion invested in the company.