Truly interesting.  I was thinking about this months ago.  Wondered why no body has done this yet before.

It is worth noting that in order to put 500 Euros on the side every MONTH means you need a pretty good salary out here in Europe.  I would assume it is more likely that average Europeans would be able to put less than a quarter of that on the side instead.

But even then.  100 Euros per month since 2017 would get you to about 50 thousand Euros today with an investment of 7.2 thousand.  Amazing none the less.

Consider Bitcoin doubles after the 2024 halving.  That is around 90 to 100 thousand Euros with an investment of less than 10 percent of that.