ECU 1998, 585 Gold [opgelost]

I've got this coin from my grandma:

https://en.numista.com/catalogue/exonumia216265.html

I just found it on this website and nowhere else so i am curious what it's about and what it's worth is eventhough i don't want to sell it.

Thank you.

This is a medal commemorating the European Currency Unit (ECU), forerunner to the EU's euro. Here's a brief explanation of the ECU: https://en.wikipedia.org/wiki/European_Currency_Unit

Here's a recent sale of your medal for 65 euros. https://www.catawiki.com/en/l/34190113-europe-penning-ecu-1998-europa-gold