So here, what we really want to understand is the probability of bitcoin reaching $500,000. The market cap will have to be $8 trillion dollar for bitcoin to hit that landmark. So do you think there is a little probability for that???

With the current market trends I don't think that the bitcoin price will reach at that level. I assume that this is what John McAfee wants as he owns huge amount of bitcoin in his wallet. It will be too expensive for a ordinary people to take part at that time.