RSU立刻卖出只交INCOME TAX，但在手里后涨了会有captial gain， 要另外交税，RSU的交税比较复杂

https://www.nasdaq.com/articles/when-should-i-sell-my-rsus-restricted-stock-units#:~:text=Should%20I%20sell%20my%20vested,to%20no%20capital%20gains%20ramifications.