You need to provide evidence for what you say because as far as I know not many countries consider adding bitcoin to their reserves like El Salvador did. Central banks, especially major powers like the US, the EU or China, the three largest economies in the world, have never expressed any intention of adding bitcoin to their national strategic reserves. If there is any, it's all just rumors, no official information has been given yet.

This is the perfect scenario for bitcoin price, it would send the price soaring but that won't happen anytime soon, IMO. It is still too early to think about the prospect of central banks considering adding bitcoin to their reserves while even the legal framework for bitcoin/cryptocurrency is not 100% complete.