is it easier to go from zero to $1200 than late hundreds to tens of thousands?
I disagree...what is (typically) more difficult: get laid for the first time or forty times between 10th and 50th time?

Getting laid for the first time is the most difficult part here

after then its an easy process your shyness and fear disappears and you are as confident as ever

Bitcoin $50,000 each by 2020 it's impossible I also don't have some good hope about this. If ever this would happen let's imagine for a while than how great this would be. But it depend on market demand and adoption.
How about mass adaptation lets assume that all the major highly populated countries having economic instability and crises and people starts to hear and know about about bitcoin and there is a major shirt and interest in bitcoin the price will definitely increase without a doubt but $50000 a piece

Mass adoption can grow but it is not going to be an overnight thing, if bitcoin reached mass adoption in 50 years it will still be insanely fast, to do that in just a few years is simply not possible in my opinion.