Nigeria is a large post-colonial petrostate, assembled via British conquest of a wide variety of indigenous nations from ~140 and ~110 years ago. Between suffering from "far-away white men drew lines on a map" syndrome, various civil wars and coups, and population of almost 1/4 billion - it's a classic "every possible generality is false" situation.
I wouldn't advise anyone to count on stability, security, or rule of law in Nigeria...but looking at post-2016 America, I might have similar doubts about my own country.