So far, hardware wallets (like Trezor One, Trezor T, Ledger Nano S & X) are safer than storing coins in software wallets. But, I don't really like the plastic material used to coat my most valuable things, right now Trezor is as famous as the Ledger, but there is something safer and better than the two popular hardware wallets, namely NGRAVE.


This is not a promotion, but an objective assessment. Ngrave is coated with metal, anti-rust, waterproof, and fire-resistant, which means it will be safer when you are in an emergency situation such as a house on fire, or an earthquake.Even though it is not very well known, they claim that NGRAVE ZERO is the coldest wallet ever, because the transaction confirmation process and data transfer only uses one-way QR Code.