the cryptocurrencies will be the national currencies in 10 years or less
Wow, I see that you are pretty sure of your claim there pal no? I presume you are a time traveler and have a time machine? Please do tell me what will be the winning lottery numbers, that would be really great. LOL. Sarcasm aside though, as much as I love crypto currencies, I really do not think that any crypto existing has the qualities that a national currency must have. And I pretty much think that we still do not have the capabilities to build a technology to be able to do so. There are just so many things that should be taken into account when making something as a national currency. An example is usability offline, most preferably on remote areas, fast transactions etc. But still, we cannot tell. Maybe some time in the 10 years you have mentioned will come a time when these issues are already fixed and will become just a thing in the past. But till then, I ain't gon be believing.