It all depends on what we are doing and how much we are earning. We don't need to do multiple jobs before we could be okay and stay fit. Although this is based on the region and what we proposed to be doing to get money from ourselves. There are people are have only a source of income but the income is pretty okay for them to keep paying there bills and living a good lifestyle. It is very important for us to make plans and not depend on just a single income for us to survive. We all need to get something doing and make sure we don't create problems for ourselves because we want to have multiple streams of income. One income can still covers all the bills.
Yes, this really depends on how much income we have, as you said, if the income we have can meet every need we need, of course this is not a problem for us because the income we get is still able to meet our needs. but it's different if the income we have is only enough for our needs and we can't have savings or even invest, I think it would be better for us to look for other sources of income so we can have savings and even invest, because if we don't have investment for the future and it will be very difficult for us to face future situations because we didn't prepare when we were young.