The big money is not in the buying and selling ... but in the waiting.
The basic concept of value to a private owner and being motivated when you're buying and selling securities by reference to intrinsic value instead of price momentum - I don't think that will ever be outdated.
Kellogg's and Campbell's moats have also shrunk due to the increased buying power of supermarkets and companies like Wal-Mart. The muscle power of Wal-Mart and Costco has increased dramatically.
Wrigley is a great business, but that doesn't solve the problem. Buying great businesses at advantageous prices is very tough.
If all you succeed in doing in life is getting rich by buying little pieces of paper, it's a failed life. Life is more than being shrewd in wealth accumulation.
It took us months of buying all the Coke stock we could to accumulate $1 billion worth - equal to 7% of the company. It's very hard to accumulate major positions.
A lot of share-buying, not bargain-seeking, is designed to prop stock prices up. Thirty to 40 years ago, it was very profitable to look at companies that were aggressively buying their own shares. They were motivated simply to buy below what it was worth.