ARK's flagship fund is still rising; The decline in stock prices highlights volatility.Cathie Wood, Wall Street's star manager and head of Ark Investments, has been hit by a double whammy because of her main shareholding$Block(SQ)$Company and Coinbase Company have been plagued with negative news recently.On Thursday (23rd), Hindenburg Research, an American short seller, pointed its finger at Block, a financial services company. After the report was issued, its share price immediately plummeted.On Wednesday (22nd), the US Securities and Exchange Commission (SEC) issued a Wells notice to Coinbase, the largest cryptocurrency exchange in the United States, saying that Coinbase was suspected of violating the investor protection law, which indicated that it