If you look at the top 10 companies by market cap every decade, you'll see the churn in them. The lineup in 1910:
• United States Steel Corporation • Standard Oil Company • American Telephone and Telegraph Company (AT&T) • Union Pacific Railroad / Pennsylvania Railroad • International Mercantile Marine Co. • American Tobacco Company • U.S. Rubber Co. • Central Leather Company • Amalgamated Copper Mining Company
And today:
1. Nvidia – ~$4.57 trillion 2. Apple Inc. (AAPL) – ~$4.04 trillion 3. Alphabet Inc. (GOOGL / GOOG) – ~$3.79 trillion 4. Microsoft Corp. (MSFT) – ~$3.63 trillion 5. Amazon.com Inc. (AMZN) – ~$2.70 trillion 6. Taiwan Semiconductor Manufacturing Co. (TSMC / 2330.TW) – ~$2.14 trillion 7. Meta Platforms Inc. (META) – ~$1.81 trillion 8. Broadcom Inc. (AVGO) – ~$1.57 trillion 9. Tesla Inc. (TSLA) – ~$1.40 trillion 10. Eli Lilly and Co. (LLY) – ~$1.18 trillion