Reincarnated as the strongest in the world

I was know as an unparallel genius. People admire me at the same time fear me. Governments from all across the globe tried to recruit me as of to obtain the advance technology i had in my possession. However, they don't know who i am since i disguise myself as an assassin to clean up the 'trash' in sociality. Because of that they have no idea about my well being.

However...

I die because of a sneeze. How embarrassing can this be?!?! Oh well at least i got reincarnated.

Little did i know what lies ahead of my destiny is surely a dangerous one.