If bitcoin will have a price of $50,000, I think it will completely change the economy of the cryptocurrency, and maybe even change the economy of the whole world, because so many people around the world will want to buy bitcoin or some altcoins because after the bitcoin, the price of other coins will also rise.
I agree, but I dont see a reason for it to be $50k. Speculators are good for short term benefit (Nov, Dec, Jan), but not good for the long term growth and confidence in currency. I would prefer it to rather loose volatility. That would be good.