And if your "geopolitical foe" uses all the riches you've helped them gain to expand their influence into Africa and gain more resources?

Or if they cut off supply and you're woefully behind on being able to capitalize on your own resources?

Besides the obvious strategical failings of this notion, we don't live in some stupid game where people are keeping score or will be declared "the winner". If you're approaching geopolitics with the attitude that there will be both winners and losers then you don't understand the first thing about it. The human race is facing extinction. Either everyone wins or everyone dies.