Strangely I do think that Bitcoin is really the future medium where we will store our asset, more like the digital gold of the world. Because Bitcoin is not a physical asset which means Bitcoin is physically impossible to destroy, or to be stolen. The practicality also comes in mind.
I agree with you that bitcoin is the future medium where we will store our assets, but always remember than bitcoin, albeit physically impossible to be destroyed, can be stolen using some means. All system have their flaws, including bitcoin therefor,e there will always be a loophole that will let one steal bitcoin even if it is hard to do. Still, I believe that gold will also continue to be a reserve currency even if bitcoin becomes one.