They haven't passed this tax yet:

The plan is not adopted, and getting it over the line would require unanimous approval from all 27 EU member states, a threshold that has derailed or delayed many tax measures before.

However, given the way of things, seems like this or something similar are almost inevitable:

At the center of the discussion is a 0.1% tax on crypto transactions across the EU. The European Commission sees that option as a potential new revenue stream for the bloc, with estimates pointing to €3 billion to €4 billion in annual proceeds.

A second route is also on the table: a capital-gains tax on crypto profits. That alternative is expected to raise less, with estimates ranging from €1 billion to €2.4 billion a year.

A transaction tax is bad enough, but much worse is the sort of surveillance that is justified by such a tax:

the exact collection mechanics across jurisdictions are not defined in the proposal as described.

I don't see how they pull something like this off without some kind of even worse move against people who don't want to use custodial services.