Keep both of them! It's not "either/or", it's "both/and" for real. Catho might be less hyped up, but there's still people recruiting there, especially at medium and smaller companies that aren't as deep into the LinkedIn hype. The advantage is you're competing with fewer people on Catho - there's less profile activity there regularly, so when you show up with a well-filled resume, you really stand out.
What I see a lot is that experienced recruiters use LinkedIn for active search (that thing of filtering, finding people who are actually looking), but a lot of companies still post jobs on Catho too because it's cheaper and attracts more focused people. It's kind of become complementary really. If you've had success on Catho before, don't abandon it - just don't drop your focus on LinkedIn because yeah, the recruiting movement there is way bigger and you can get direct contact with people who are specifically looking.
Spend a few minutes every week updating both, but put most of your energy into LinkedIn - customize your profile well, activate your job-seeking status, connect with recruiters and managers in your field. And don't let Catho die on the vine, because there's still good job postings there that don't show up anywhere else!