Well yes given the long term horizon of 5 years I see btc may be somewhere above 25000$ or so. But in couple of year 500000$ is weird considering the altcoins coming in market are also started to capture a bit of market. And the pace at which technology is changing in next 5-10 years there would be something new and better than btc may come up which will eat away btc market if people like that thing more. So price may drop at that time.


But if it reaches this mark by 2020 everybody who owns it will be super happy .