He's a budding value investor and his role model is Warren Buffett which means he's buying undervalued stocks that have good fundamentals.
One of the companies he says he bought is Samsung. And while there may be a correction in the future, it's self evident that Samsung is a legit company with strong fundamentals.
Also he said in the article that he's investing long term: “Rather than short-term focused day trading, I want to keep my investment for 10 to 20 years with a long-term perspective, hopefully to maximize my returns.”
Value investors and students of Warren Buffett know that part of investing this way means you need the equanimity and tenacity to weather any short term volatility.