I recommend that investors dedicate their investment management to professionals and hold their investments for a long time. This will save them a lot of time and stress, and their investments are much more likely to perform better.
This may sound like a personal choice or attitude only. However, it depends on several other factors, such as short-term or long-term financial goals, time horizon (especially age if you are planning for retirement), financial situation (ability to withstand losses), and investment experience.