Who would want to be a solipsist? You would be a supremely religious atheist, a totalitarian anarchist, a serial-killing war-mongering suicidal pacifist, a criminal kingpin who is also the police, an institutionalized maniac who is also a psychiatrist. Who would want to be such a conflicted manic-depressive? Being a serial killer with immortal victims would add to your insanity if that is possible.