$NIO Inc.(NIO)$ The first surefire buy for long-term investors with $300 is China-based electric-vehicle (EV) manufacturer Nio. Though EVs should be one of the most exciting and sustainable growth stories over the next 10 to 20 years, the ramp up in production won't be without its hiccups and casualties. For instance, Nio's production was hindered for more than three years by China's stringent COVID-19 mitigation strategy, which led to a host of supply chain constraints. But there's good news on this front. This past December, China abandoned its controversial "zero-COVID" strategy and effectively reopened its economy. While it's going to take a couple of quarters for things to get back up to full speed, the proverbia