Not necessarily.
You see, you can do many things and still stay focused.
Example
When you start a business newly, you must focus solely on that business until it grows. When it grows, then it can be slightly independent of your full attention. This is when you can open another business or another investment. Give the new investment your attention and also the old one some attention. This is when you can call someone to take care of the old one for you, while you focus on the new one fully, and the old one partly.