I think btc will reach about $500 sustained price by 2020.
I think you're wrong by several orders of magnitude in one direction or the other. i.e. $50,000 or $5.
It will never crash for obivous reasons, but 50K seems too far fetched on that limited amount of time. My take is that by about 2025 we'll be at around 10 times the ATH (12K)