And because its an ERC20, JAXX wouldn't have support this early so it wouldn't be able to display your ICX if that makes sense. You'd want to be able to have a wallet, where you have possession of the private keys, that has the compatibility. myetherwallet has all of this.

I'm still new to crypto (less than a year reading, 4 months stumbling around exchanges) so I'm happy to stand corrected.