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.
At the end of the day, it's all about determination, anyone that really want to achieve anything in this life will do what ever it takes to achieve it, while another that doesn't want to get involved in anything in this life will always have a reason why it's not a good idea to get involved in the first place, so truly, as you have said already, if this man can, we can also do it.
Another thing we should also pay attention to is your discretionary income, how big is it?
You can't just be investing 2k naira weekly in Bitcoin and be expecting to accumulate up to one Bitcoin, the s size of your discretionary income is as important as your will in other to achieve such target.