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Key factors that he may have used
1. He started from where he is at
2. Obviously paid attention to securing his bitcoin
3. Took advantage of time and bitcoin pumps along the way worked for him
4. Consistency and was in alignment with his mission
5. Obviously disciplined, no excuses, no greed.
Anything you do in this life, just make sure you are determined set your goal and keep to achieving it but I will like us to be real with our own situations as well. This man probably had the opportunity and bought Bitcoin when the price was low, not when it's this expensive and he must have sold a lot of recycled aluminum waste, he might also be a distributor as well.
I don't know if there is any kind of motivation you can do with this kind of odd job to buy Bitcoin today, those things are only going for as low as less than $10 if you check the price of waste recycled things. How many do you think someone is going to sell today to be able to buy 1 Bitcoin? You will probably be selling trailers of waste cans and plastic bottles not to talk how much this things are not too value here in Nigeria.
I agree with your key factors actually, if you have ways to buy Bitcoin, take the advantage, don't procrastinate, be discipline and no excuses.