well not a psycho, just someone who suffers from a mental illness, which when uncontrolled can lead to severe social dysfunction, as we saw some months ago. The main problem with Bipolar disorder is that the sufferer frequently lacks insight into their condition, which makes treatment even harder.
An excellent movie of someone who suffers from this condition is
Mr. Jones starring Richard Gere.

Of course, totally not related to bitcoins, but movie is so good in my opinion, worth sharing.