That is correct. Currently your collection can not be viewed, as you have it turned off - I think that is the way all Profiles start out, then a member has to choose to let it be seen. I created the link below for when it is viewable - only you can amend your Profile though.
https://en.numista.com/echanges/voir_collection.php?id=20067
Go to 'Your account' on the left here, then 'Settings' and at the end the section -
Personal options

Allow everyone to view my collection
First image is as it is currently, then second is with that box ticked, and third is with the box above it ticked as well. I made up the quantities in them, just to give an idea of what it may look like.
So below the 'Member since' part is then added 'Collection' as well, with a (view) link to click on - which would then make your link above work, to show your Collection.