If someone could fundraise a billion dollars, using it to steal another billion dollars (not great ROI considering all the security risks of bitcoin ecosystem)

If someone could fundraise a billion dollars, using it to steal another billion dollars (not great ROI considering all the security risks of bitcoin ecosystem) at the expense of shattering worldwide faith in Bitcoin (which also devalues the stolen coins), seems a really bad bet. It only makes sense if it was a government or some group spending a billion (semi illiquid because Bitcoin) dollars with the goal of destroying the Bitcoin ecosystem.