Even guys might not be able to achieve 1 bitcoin in 10 years or even in 20 years by investing $50 to $100 per week, $50 to $100 per week is a good amount of money for a lot of people, and $100 per week is $5,200 per year and $52k over 10 years... and perhaps a guy starting out at $100 per week today, might be able to increase the amount that he invests into bitcoin by 10% or more each year, and so if his income is stable and/or increasing, he may well still be in a good position.
Even guys who are not able to invest $50 per week of bitcoin, and they have much lower incomes, they still may well be quite a bit better off for having had invested in bitcoin rather than if they had not, especially if they can continue to invest into bitcoin in a relatively consistent kind of ways for many years into the future.
It's true that some guy might not be able to reach 1BTC, because reaching 1BTC is not an easy task especially when the purchasing is lower, it will actually be difficult for some people, despite the bitcoin grows in value, though there's nothing bad in achieving that, as such, in my own opinion I prefer guys that focusing on a specific bitcoin target than targeting 1BTC. Especially when they focus on building the habits of consistent bitcoin accumulation through Dollar-Cost Averaging over a long-term period. The most important thing is not actually whether one reaches 1BTC, but if they can continue maintaining thier consistency for long-term holdings.
However, guys shouldn't allow the thought of [ I can never own 1BTC] to discouraging them on thier regular bitcoin stacking. Consistent buying of $10 or $20 worth of bitcoin every blessing weeks is actually a meaningful holdings for some guys and keep on maintaining the discipline over several years can definitely make a huge differences. Doubling or increasing the accumulations gradually as income grows is sometimes more effective than deploying buying while waiting for the perfect time to invest. Bitcoin success is based on long term consistency. Not buy hitting 1BTC.