Everyone says "just buy a broad market ETF and chill," but the massive growth of AI makes me want to over-weight my portfolio into tech-heavy thematic ETFs. My concern is overlapping holdings—many of these tech ETFs hold the exact same top 5 companies as the S&P 500, just in higher percentages. How do you structure a portfolio to capture massive tech upside without accidentally doubling your downside risk on the same 5 mega-cap stocks? #mystocksquestion