Based on the list of 2022 Top 10 most popular US stocks and ETFs among Australian users on Tiger Trade, I have only traded $Apple(AAPL)$  (5th most popular) and $Tesla Motors(TSLA)$  (3rd most popular) stocks. Apple is my best performing US stock with a paper profit of 10.15%.

Apple is the world largest company by market capitalization with a market value of $2.389T on 10 Feb 2023.

A combination of supply chain disruptions, a weakening environment for consumer discretionary spending, and adverse foreign currency exchange movements hit Apple in 2022, and some of those issues are likely to extend well into 2023. Apple's dominant position in the U.S. smartphone market and its opportunity to grow sales and market share worldwide as the number of smartphone users increases continue to have a positive impact to the company. The underlying growth of its higher-margin services business is also improving the quality of its earnings.

Apple’s share price might continue to decline in the short term due to the market weakness. I still think Apple will continue to be the safest choice under down market as it remains a reliable and resilient stock.

Apple is a good example of company with wide economic moats when we are looking for companies to invest in. To protect our investment capital in the long run, it is better to look for companies that have wide economic moats, as such companies can continue to grow their revenues and profit margins in the long run.