People who are already using bitcoin will surely invest their money into bitcoin at a moment as they are aware that bitcoin can make them rich in a short period of time.
I will choose bitcoin.
I will choose bitcoin.
What will happen if the prices crash 50% all of a sudden and remain there for the next 2-3 years? Do you remember what happened after 2013? Bitcoin exchange prices went down for almost 3 years, before finally stabilizing in 2016.
Why should Bitcoin crash all of a sudden?
If prices go down that much, there is always a reason behind such a plunge (just like it happened in 2013 after the Mt. Gox went bust). So I don't think it really comes down to what you call "all of a sudden". That said, Bitcoin prices went down only for a little longer than just one year. The price bottomed somewhere around 170 dollars per coin in early 2015 and started to gradually rise in September of that year. Since then there were no major crashes, and Bitcoin has always been doing higher lows (at least, on a timescale longer than a few months)