- You can wipe the device and generate a "new" seed as many times as you like
- If you still don't trust it, you can simply generate a 24 word seed offline and restore THAT to the device instead of letting the device generate it for you
i know that maybe I'm just being paranoic, but bitcoin price will increase and I plan to hold it for very long term... then I can not stop thinking about if it is really safe or not. And if there is a software to monitor or transmit the data. Finally we have to trust the software manufacter. Maybe they are just waiting bitcoin to skyrocket and them clean everyone funds.
Read this paranoic article here: https://www.reddit.com/r/ethtrader/comments/62eu50/how_safe_is_a_nano_s_for_cold_storage/