For me, as of now, the cryptocurrency could be considered as a potential superior of fiat money. However, we will not be able to tell if it would really become a superior currency in the future since it was not yet adopted by everyone and would dramatically change in the future as well. What I am thinking about is that if the elite was able to control the currency then there's a big chance that they will also centralize the cryptocurrency ending up as the cryptocurrency becoming a central currency that is traded digitally.
In my opinion, yes, within the scope of the original post.
BTW, sound money can mean gold or Bitcoin, or any state-issued money based on them -- I didn't use it to mean only gold and silver based systems.