I would add 1 or 2 filters in the 'Wallet' category
The first to give the option to get the list sorted according to their type: web-based wallets, hardware, and others.
The second would be to sort the list according to the OS: Windows, GNU/Linux, Android, and others

To categorize the list of merchants.
You will sooner or later end up with a list that is too big to search for something effectively. Categorizing them can be helpful for the visitor

The exchange list is too big, filters are more than necessary here.

Overall, the site is great and simple, just need some updates here and there. For example, Lavapay closed and isn't online anymore, the same goes for BonPay. I didn't check all of them just the 2 sites mentioned since I was curious because I didn't hear about them recently

The 'debit cards' category
The name of the cards redirects people to their respective reviews. In these reviews, It might be useful for visitors to have a link to go to the site in question. This would avoid having to go to a search engine to enter the name of the journal.

Edit:
My bad, I realized there is already a "visit" button on the right of the debit cards page. Sorry