The moment of truth is about to arrive for Gulden, I know Biomike and Rijk proposed that Gulden would be more stable in price compared to other coins when bitcoin drops because it's more tied to the Euro. Bitcoin is dropping and it's time to see if Biomike (who i respect as a trader) and Rijk (Founder of the best coin in crypto) is right.
GRS was the coin of 2017 with all it's updates and $160 million marketcap. The updates weren't innovative but they keep up with bitcoin changes and copy good parts of other coins well.
Funny you mention GRS, as I've been contacted by members of their community past few years about ditching country coins as GRS has true innovation according to them. NLG has been keeping up with BTC changes as well, so there is nothing new here.
As for price stability, with the recent price going up in fiat (mostly driven by crypto in general) this has been at stake, but a few cents is still doable. Bittrex still seems to rule the market, so it will be up to the EUR exchanges to lock that wealth, preferably before the crypto market gets a correction/crash.