People underestimate the crap out of goku. He could literally destroy the whole universe in moments. Proof? Link below is Superman vs. Goku but it goes over Goku's power. Very, very, very long article but you cant discredit the info because everything is fact.
http://www.screwattack.com/news/death-battle-erred-goku-vs-superman
English
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I didn't click the link, but anything about a fictional character cannot be fact. It would be evidence based speculation.
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*atheon opens the timestream*
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^didnt read article