$PDD(PDD.US) feels like many people are short-termists, caring about daily ups and downs. Actually, if you're investing in stocks, it's best to be a long-termist because investing is a long-term endeavor. Buying stocks means buying a company. As long as the company's development is on track, you can hold it steadily. At most, you can do some day trading to lower your holding cost. Those who obsess over short-term stock movements are essentially speculating. Speculation requires chasing hot topics, hype, and quick profits. So, before buying stocks, ask yourself: is this an investment or speculation?