Cathie Wood’s ARK Invest has made a bold move by purchasing nearly $18 million worth of Coinbase (COIN) shares, just two days after the investment firm had sold some of its holdings in the cryptocurrency exchange. The purchase comes at a time when Coinbase is facing regulatory scrutiny from the US Securities and Exchange Commission (SEC) over its lending product. Despite the regulatory pressure, Wood and her team at ARK Invest have shown confidence in…