Sorry for not being able to explain clearly. What I mean is that people in middle-class households cannot invest in anything they want because their limited income makes it difficult to manage the household. Those who have only one income field have less income, so they have to save first if they want to invest. I am not saying they will save to earn good profit. They will save to raise investment capital.
It's sad that from the poor to middle class are dealing with the same thing but obviously, the poor is the one that's struggling more. While before and several years ago, the middle class can live a lavish life without having any problem at all. And now, this seem to be the new poor description by being in the middle income earners. But there are a lot of middle class that are wise with what they earn and learned how to save and to invest properly so that they won't downgrade their lifestyles in the future.