My biggested investment is actually my acquired skill and established agro-allied farm in a very lucrative area.
I know many youths wouldn't wish to venture into learning skill because it us seen as time wasting.
But trust me, farming is the most lucrative among all ventures this days, because it will feed you and by extension feed others.
Though for now, I've not being able to extend the farm to cover all aspects of agro-allied due to many physical factors but soonest expansion will be inevitable. For now, I am into fish farming, snail farming and few other aquacultures.
Though it is not a business that you invest in a day and earn or benefits the next day, it actually involve much patience and seriousness to get here.