So, people earning minimum wage ...live from hand to mouth, they will never have the full amount available to buy Bitcoin. The best bet for them will be to get a second job and to use the full amount from that job to fund their first Bitcoin.
Also ... you have worked with a fixed price... so if the price of a Bitcoin goes up, then people can sell their coins.... wait for the price to go down and then buy more Bitcoin from the profit. (this is what I have done and I reduced the time and money from my wages to get to that first coin.
It's not that bad. In some EU countries minimum wage may not be enough to rent an apartment by yourself, buy food and save up, but if you have some wealth given to you by your parents, like you own an apartment and share it with someone, like a girlfriend, you can live fine on 2 minimum wages. It's not going to be a life of adventure, if you know what I mean, but you should be able to save up, be able to buy a car, go abroad for holidays and all that. It's not like minimum wage = slavery everywhere you go. In some countries it only allows to buy the most basic things, but not in all of them.
What is the most interesting is how many countries are at 5k+. If you're at 5k it means unreachable, because you're saving up in fiat terms, so the more time it takes the more impact inflation will have on your savings and the more expensive bitcoin will be. If you decide to save up with a goal of 1 btc over the course of 3 years, that's doable, but 5 years will mean that bitcoin will go through a whole cycle while you're doing it, and at the same time yo will lose at least 5% of what you were trying to save up each year. What looks now like 5 years may in fact end up being 7, or more.