Coinbase CEO Brian Armstrong has followed through with his plan to sell 749,999 shares of COIN, worth around $292 million. Despite concerns that the sale could lead to a drop in the price of COIN, investors seem unfazed, with the stock price remaining relatively stable. Armstrong's sale represents only a small portion of his total holdings in the company, and he has stated that he plans to donate the proceeds to charity. Coinbase went public in April of this year, and its stock has experienced significant volatility since then.