How much do you invest in individual stocks in Korea?

Recently, there has been growing interest in investing in Korean stocks. How much are you investing in individual stocks like SK or Samsung in Korea? Typically, it is recommended that the investment proportion in individual stocks should be around 10-15% of the total portfolio. However, a Korean finance YouTuber has ignored this ratio and invested everything. I wonder if this is a safe choice. What do Korean investors think about this? Please share your experiences regarding the investment environment around Gangnam or Hongdae, and how effective such a strategy is. If you have any advice, experiences, or opinions about stock investment, I would appreciate it if you could share.