If ever any of the other chains goes onto a fork or does a blockchain rewind, any floating XCP that got sold would end up being able to be double spent.
Maybe this is a rare enough thing, then again, didnt DOGE just have one of these? The stability of XCP would end up being the stability of the weakest chain it ever floated on
James
Perhaps it would only be implemented on certain chains that are expected to be secure and stick around for the long run, rather than able to have XCP on every random BTC/LTC clone. There could be 3 maybe. BTC for security, doge or litecoin for transaction speed and then maybe something else which allows relatively large data storage or something, idk. But really though, anything could happen to anyone or any coin at any time (fork, attacks, price crash, whatever). BTC is just the hardened veteran