I have weighed the pros and cons and decided that the risk is acceptable to me for a device that keeps the keys to my limited bag of altcoins. I could move them to my Trezor but I want the Trezor to be Bitcoin-only and with a Bitcoin-only firmware. I don't feel like purchasing another hardware wallet for them and the only alternatives would be to move them to software hot wallets or exchanges and that's not something I would consider.