If you buy crypto currencies in one country and then travel to another country, as long as I have the passphrase and private key on paper, hidden in mulptiple places and the crypto on an online exchange, no kyc, p2p bought, non custodial and bought on a clean laptop, can I delete the website from by laptop, including the online wallet, and then sign in again to that exchange after travelling.
You can delete the cookies in your browser so there is no websites list on your laptop. But the best thing you can do is reinstall the laptop, so there is no sign that you already use that laptop.
You need to keep the passphrase and everything related to your activity on your computer and do the thing in the above step for the wallet.
You can buy a new laptop in the destination country and install everything necessary to access your credential, including your wallet, to make a transaction.
I have heard, dont know if it is true, but better safe than sorry, that they now have devices to scan your smartphone and laptop to see what is on it. I would not be surprised if they do that now, the governments of the world are becoming very anti crypto currency, especially for privacy coins.
Not all governments will become very anti cryptocurrency, and you can feel safe when you visit their country.