Actually, yes. You are safe until you remember your seed phrase. Even if you lose your cold wallet, you can recover your tokens. The main thing is to remember a seed phrase. Then you can just buy a new cold wallet and connect it to the same account with this seed phrase. The most important thing is not to share your seed phrase and store is somewhere on paper.
Quick reminder that it's heavily inadvisable that you memorize your seed phrase. So much things could happen that could end you up losing the seed phrase on your head; from unexpected brain aneurysms, various kinds of accidents, or you know — just you forgetting them.