According to @StockMKTNewz, the five largest US public companies by market cap are Nvidia (NVDA) at $4.3T, Microsoft (MSFT) at $3.8T, Apple (AAPL) at $3.5T, Alphabet/Google (GOOGL) at $3T, and Amazon (AMNZ) at $2.5T (source: @StockMKTNewz). The next five are Meta (META) at $1.9T, Broadcom (AVGO) at $1.7T, Tesla (TSLA) at $1.2T, Berkshire Hathaway (BRK.B) at $1.1T, and Oracle (ORCL) at $868B, underscoring AI and cloud-heavy leadership in US equities (source: @StockMKTNewz). Notably, Palantir (PLTR) is listed at $404B within the top 30, while the first five outside the top 30 are AMD at $259B, Wells Fargo (WFC) at $258B, Philip Morris (PM) at $253B, Morgan Stanley (MS) at $249B, and IBM at $240B (source: @StockMKTNewz). For traders, this concentration suggests cap-weighted index and ETF risk is dominated by AI and tech megacaps, while the post provides no direct commentary on crypto market impact, meaning any BTC/ETH implications are not specified in the source (source: @StockMKTNewz).