When you buy Bitcoin in 2020, you already know what to expect.
I may not expect that it will double quickly and make money from it or even fully adopted. We know already that Bitcoin won't warrant anything, nor to think that every year the price keeps moving higher. The market will remain an unpredictable, volatile, high risk, and anything we can negatively describe it but above all these things, we are making yourself easier than before.
We can't just say that Bitcoin is the future currency because, in reality, not all of us are capable of having this and to use this.
I don't agree with you, because before, no one could drive a car, let alone planes and spaceships. However, now it is our everyday life and thousands and tens of thousands of iron birds dissect the air space. It will also happen with bitcoin - now for many it is a wild and incomprehensible phenomenon, but in a couple of years everything will fall into place.