The biggest threat to Africa and to rest of the world is not from Africa , it is from the Western world especially from the EU and the US . Its name is the failing education system. Those countries have a tremendous amount of weapons of mass destruction,unfortunately they put in place too many laws that do nothing but destroy personal effort in school. Many students are becoming extremely lazy, only relying on lawsuits to intimidate schools and make the grades or rip off educational institutions in the name of civil rights. No discipline, no respect for human dignity, and enjoying deceit and lies. These people who do not want to make any personal effort are the ones who will be elected as country leaders in a near future thanks to Democracy.
Knowing that they have all those massive and powerful weapons , what will they do once in power , ? Nothing but prey on defenseless African countries. It will be worse than what our ancestors went through during slavery or colonial times.

You should be much more worried about your politicians and corruption.
Lagos 1960's when the Brits handed over the keys to the castle.

https://www.youtube.com/watch?v=At6zO21Cjog
The Brits, although the biggest colonizers, do leave their systems of common laws, government, education behind
for others to follow, some take advantage others just want to get into government to pilfer and take bribes.

Having too much weapons is a two way thing. It's dangerous to the host/owner same way to others. To the host; natural disaster could cause mishap, mentally ill in charge of the weapons, and mistakes or bad maintenance. So, in simple form, all should be worried