A card, either Mastercard or Visa, operated by a centralised organisation. It means even if they don't have your KYC, they could still freeze your funds anytime. Out of card providers, still the company that issued the card for you could freeze your funds as well. For example, I have been using the Redotpay Visa card through its KYC service. In such a case, Visa and Redotpay both could freeze my account with the funds. You really can't use the card without any centralised organisation. When the issue is about freezing funds, it doesn't matter whether you use a KYC or non-KYC card.

However, those are criminals; they could survive even without a card. Only crypto users think about their privacy; if someone wants to avoid KYC, it doesn't mean he is a criminal anyway. You need to choose a solid service provider to use a non-KYC crypto card. And you shouldn't deposit a big amount there. Just use a small amount and refill when you really need to.