Nothing like a credit card for sure. If you hold your cryptos in separate software wallets (Blue wallet, Trust wallet, etc...) or exchanges (Coinbase, Binance, etc...), it's more like debit cards. Plus, let's say you use an exchange like crypto.com and have one of their Visa cards (which are debit cards), should you declare it? I don't think so.
Another dilemma is if you hold your cryptos in a hardware wallet and cross the border with it.
I think we also can make a good reference to stocks. Are we allowed to travel while investing in stocks using apps, such as Robinhood, valued more than $10K without declaring? If yes, then holding crypto should not differ that much.