Half of all crypto confusion traces back to one physical object: a printed address. A paper wallet taped inside a drawer, a sticker on a laptop, the QR at a market stall. Paper outlives the person who printed it, and paper does not warn you when it is being used wrong.
I keep seeing the same two failure stories. First: someone finds an old printed address, sends coins to it, and waits. The coins are fine, but the keys were on a hard drive that died, and an address without keys is just a shape. Second: someone scans a printed QR at a swap meet and the payment lands somewhere strange, because the sticker was printed years ago by a generator nobody can name, and a QR is just a delivery method for a string. Nothing about the string says who printed it or with what intent.
The fix costs about ninety seconds and it is not software. Before anything valuable moves to a printed address, test it. Send a tiny amount first, the size you would not cry about losing. If the receiving side shows it, the path works, and only then send the real amount. This rule applies to exchanges, to hardware wallets on firmware you have not used before, and absolutely to any address you did not generate yourself in the last hour.
Same energy for the printing itself. Thermal receipts fade in a year. Inkjet smears. Laser and steel last. If an address matters enough to print, it matters enough to print twice, in two places, and to keep the seed phrase somewhere that is not the same building.
None of this is exotic advice. It is what every careful person already does with house keys. The chain does not care about your caution, but your balance does.