According to the article this man has been collecting and selling used cans for the past 2 years and uses the proceeds to buy Bitcoin and now he is near having one Bitcoin.
This one na "bambabola" (Those guys who go around and pick up metals from the trash). Good idea. We can also do this but not to pick up trash like this because in our environment you. Will be mocked. Rather finds a skill, learn it and offer your services to get paid in Bitcoin instead of cash. Your clients do not need to be Nigerians because you'll likely not get paid in Bitcoin but if you go on to work platforms, you can negotiate your pay to be in Bitcoin.