I sometimes give my friends a paper wallet, with a small amount of ADA on it. I do wonder if the switch to complete decentralization, and the roll out of staking keys, may leave my paper wallet gifts at risk of expiring (This comes from knowledge the poor souls who bought Tron ETH tokens, and then missed the ‘Transfer to TRX Mainnet’, and the limited time availability to upgrade or die. I agree they were warned, but it was a sub-optimal outcome IMHO).
While it seems unlikely to me Cardano would let a such a tragedy happen, I thought I would raise it in search of the correct answer.
Will paper wallets created in 2018 require upgrading, or will the last perpetually, just without staking?