Posted on March 9, 2021March 9, 2021The Best Option All Things Considered Buying a cheap laptop or phone, used, built by a reputable mfg, wiping it, then installing a wallet and nothing else is probably the best option all things considered. https://t.co/rfierHwga0— Peter Todd (@peterktodd) December 27, 2018 For mobile device storage of coins, the device should be in factory state and have upgraded all updates for it.