THE HIGHER THEY GO, THE HARDER THEY FALL : a simple question ...A simple question for you to consider :
Why should future return of a (stock/crypto currency/fx pair) always be the same as their past returns? When the investors comes to believe that (stock/crypto currency/fx pair) is guaranteed to make money in long run, won't the market end up being wildly overpriced? and once that happens how can future returns possibly be high?