So i am down to either picking ledger nano S or coldcard but I need a reliable safe place to store it I know ledger has a name but it isn't open source right so anything can happen in the future if btc goes up in price and who knows if the card is backdoor idk i just want a reliable safe place to store these two cryptos any suggestions?
also is it true the nano S can be use also not just from your computer but I can pay on the go with the OTG cables and connect it to my phone with the ledger live app?
Sure ledger nano s, adding 25th password to the SEED like nothing else will make this hardware wallet safe and reliable. Besides that device may keep at least two sets of private keys - first one is that relevant to bare SEED while the second - to the SEED + 25th word. You can use different PIN codes to switch between the two sets.