With the level of inflation moat countries are going through, if you don't have multiple streams of income, you might not be able to afford basic needs.
People often talk about having multiple streams of income to cope with inflation and rising commodity prices. This is true but I want to say that , for people with good jobs (high positions) and high income, they don't need to do that. They should continue their work and work better to continue increasing their income. Meanwhile , people with low basic income are the ones who have to look for additional sources of income to balance their lives.
In general , this depends on each person's job and income. Not everyone should have multiple jobs or multiple sources of income because that will sometimes affect our main job because we will need to divide our time between both .
What we should care about is how much income we have instead of thinking that we should have 1 or more sources of income .