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Well if we look at the condition of the OP then the analogy is like don't think too much about tomorrow think about a bright future even though if we look closely when we don't think about tomorrow and don't have something to eat then let alone for a bright future, even for the day after tomorrow or one week ahead we don't know if it still exists or not because we are too obsessed with the future lol.
Indeed, in this case there are exceptions if we are still lived by parents but I think everyone here is very mature to just ask parents for food.
Investment is of course good I definitely support that but that doesn't mean we do everything in investment so that just to eat is difficult.
I think before reaching a certain level of income, the income that you don't need to think of how to cover your basic needs, you shouldn't think of investing at all. It shouldn't be like this, "Well, my salary is small, so, I can't afford investing a lot, but I can afford investing $50 per month, so, why not?" No. Those $50 will be taken from your "unnecessary spending", like spending on your entertainment, entertainment of your wife and kids, and you shouldn't just cut that and invest the money. Because cutting on your happiness can cause nose-diving at some point, and we don't need that.