The interest rates from German banks are not negative yet. They are not far in positve though. And some people propose to limit the amount of cash that can be used for a single payment.
It is no mistake to make some preparations for it just in case. Maybe boullion coins and a knife may have a comeback (in times far back they would cut pieces off of coins instead of fiddling with small change).
Letīs do our best to avoid to let the topic turn political. It has some preparation oriented aspects to it.
_________________________
If it isnīt broken, it doesnīt have enough features yet.