Is $50,000 reachable? Harder but not impossible! (>10 years)
I would like to sleep today and wake up after 10 years and hope to see this price 
Some well known gigs have also predicted even $1 million is possible per bitcoin within next 10-20 years.
But how much people could hold for such a long time? I guess people intend to be tempted by a little bit increases if we compare to those prices, sell their bitcoin for cash and then buy back at the dip if its price decline.