Still not buying a suicide. I think he's too much of a coward and too self-involved with his internal fantasy world, which provides a pretty big buffer to reality: these are actually protective factors although narcissistic injury is a possibility and in genuine narcissists can lead to suicide (Chris is not, despite having narcissistic--and solipsistic--characteristics at times, a clinical narcissist; narcissists have an "inflated sense of their own importance, a deep need for excessive attention and admiration, troubled relationships, and a lack of empathy for others", Chris certainly has USI, he has or had autistic delusions of the admiration he got but what he does is more for self-fulfillment than for attention and admiration although those are secondary benefits, real or imagined. Chris has no empathy because of autism, not potential NPD.) He's has shown borderline-ish behavior with friends and sweethearts before, but that could be mostly chalked up to autism as well. He does have a disordered personality, but more "type A" (schizoid/schizotypal) who tend towards delusion and withdrawal with some type "B" (where narcissism and emotional lability come in) traits making him probably diagnosable as PDNOS (not PDDNOS, pervasive development disorder, but rather personality disorder, not otherwise specified in the DSM.) Such people like almost all psych/behavioral disorders (including autism) are at elevated risk for suicide, although the suicide risk in autism is disporportinately female.
The infelicity of homeless living will be a wrench in the gears, and will be totally fucked up, but I could actually see it being a good thing in the end, after a period of chaos, as I mentioned elsewhere. I don't see him taking the coward's way out, because he's too much of a coward to do even that. I could see him getting it together a little bit enough to maybe monetize some Internets, if he were to wind up in a supportive environment (challenging him to a degree but not too much, getting meds and a little bit of human contact.)
However, in depression, the riskiest time for suicide is when the patient is actually getting a little better (on meds, typically) and has the energy to off themselves but is still depressed.