To be honest these coins are all relatively new and since people can purchase from all over the world and just trade, just makes it so much more likely for these coin values to be volatile. However in a few years I believe things will calm down. Yes a lot of coins will not be used in a regular way to pay. However prices will consolidate a bit after each run up, and people will get used to using crypto as well. I mean the euro has also been going pretty crazy against the dollar in the last year (at least for me it makes a 15% difference in my income). But here in The Netherlands within the euro zone nobody really notices as long as they don't purchase outside the euro zone.