It's unbelievable, but it may happen if someone has, then he play a ga!bling, 1 bitcoin may be increased at $1,000,000 if he/she are lucky. 
That is not the question that if is it possible to earn that much with just 1 bitcoin, but the question is whether bitcoin can reach that price, and i guess that is not going to happen so soon, it may happen if bitcoin survives for next 50 or more years and i don't know any of us will make it till then to see this thing happen.