Investors appear to be having second thoughts about Joby as its share price has fallen by more than 20% in just the past month.Investing in zero-emission flying vehicles sounds like a fantastic growth opportunity for investors. And one of the hottest trends right now involves investing in companies that are in the electric vertical take-off and landing (eVTOL) aircraft market. The aircraft can act as air taxis, transporting people efficiently while also being greener and less noisy options than helicopters. ...