3.18-19 Core✨: SEC approves Nasdaq securities tokenization📈, classifying 16 types of cryptocurrencies as digital commodities, and proposed a "safe harbor" exemption for the crypto industry; the Federal Reserve keeps interest rates unchanged📊, Powell states that there is no progress on inflation to warrant a rate cut; Iran vows to strike Middle Eastern oil facilities, oil prices soar⛽, Trump exempts legislation to control oil prices; the crypto market shows dynamics such as accumulation and floating profits, Kraken pauses IPO❌.