Yes. I agree to monthly invest in etf instead of single stock.
Reason is:
1. Your risk is diversify and do not concentrate on single stock. Imagine I found you were lucky enough to invest in HKT from 1997. What will happen !?
2. The component of the index like HSI or MSCI is reviewed regularly that's means u always hold the popular stocks if you hold those tracker fund. So you do not need to review the portfolio to change the stock yourself. It is really suitable for lazy and stupid investor like me.