Most people would get noticed for making these vast increases in portfolios. People ask how they could do the same and become rich, but Warren Buffett is in a league of his own and follows simple principles when he makes decisions.
Both Buffett and Charlie Munger suggest that 90% of people should invest in an index fund that tracks the S&P 500 and buy and hold for a long time. That fund will bring out significant diversification in your portfolio.
If you see that over 46% of Buffett’s portfolio is concentrated on Apple, you may think he could be some fool placing a bet like that. It is not a foolish mistake.
Banks and financials are a cyclical market. The market may swing up and down with interest rates and many other attributes, but banks will continue to make money on loans and deposits.