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Why?

Who says Aliens have to be hostile? Maybe they're a really good-looking friendly bunch with advanced computing power, and then all we have to worry about is them stealing our girls and mining up all our crypto.

#RealProblems :P

They can be any type. But such visit will disturb the world we know today - so much, that we can not even think now. Not even close.

Nah... I'm not so sure...
I've given it a lot of thought, and my only concerns are our girls and crypto :P