I am not certain if it is normal or not however normal is overrated and really who cares about being normal? Does it even exist?
With that being said, yes I do think that it is a possibility. Like many others living with MI, I have had intense suffering and if it keeps on repeating itself, I cannot see myself surviving it. However, of course this is the worst case scenario. But yes I have thought about that possibility due to the intense suffering with no break to enjoy life. Besides, I have nobody so I really would not be hurting anyone.
I sincerely hope that I will start enjoying life and that I will, one day, not feel or think the possibility of implementing this worst case scenario in practice.