AI buildout spend is justified even if there are 'casualties,' Jim Cramer says
1. Cramer believes Big Tech's AI investments will be transformative. 2. Global AI spending is expected to exceed $500 billion by 2026. 3. Some Wall Street analysts fear an AI bubble similar to the dotcom era. 4. Nvidia leads the AI wave, becoming the first $4 trillion market cap stock. 5. Cramer endorses key AI leaders and suggests investing in their stocks.