If you have already peeled the hologram you should sweep the funds to another wallet. Nobody can trust that you don't have a copy of the private key.
Even if you hadn't peeled them, I would probably suggest you do that anyway. Due to the issues with the keys the premium (the amount paid over the loaded amount) is very small if there's any at all. The peeled coin with the hologram is still probably worth a couple of hundred USD depending on the condition of the coin.
Hey, thank you for your answer

Yes, that’s exactly what we did for the coin where the hologram was peeled off. There are now two left that are intact: one from 2013 and another from 2014, double funded (I don’t understand why).
So, the price—if the fact that the coin is not peeled doesn’t make much difference to its market valuation, as long as we don’t take into account the BTC it contains?