Sometimes we spend money on unnecessary things. So we can avoid spending unnecessary money because we can survive without it. And we can start investing in Bitcoin with that money. We have to find a solid income source, even if it is small. So we can go ahead with our bitcoin investment. If we struggle now, we may build a bright future. Even students could save some money from their daily spending and invest in Bitcoin.
It is true there is no excuse for all the minimum wage earner, if they really want to invest they could just quit or avoid overspending on things that aren't really necessary for their life.
If people really wants to, they would find a way to make it happen, some might take extra shift to work, while other would hustle or start small business.