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. 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.