Note that “cashing out” in some EU countries means transacting your cryptocurrency tokens in any way, not just trading them for money.
Example:
Sweden taxes your gains when you transact a cryptocurrency holding, also when you exchange from one cryptocurrency to another. [1]
Same for Denmark [2].
Check your relevant tax legislation for your local rules.
[1] https://skatteverket.se/privat/skatter/vardepapper/andratill...