The best method of avoiding a situation similar to people like James Howels, who might have the largest lost Bitcoin wallet, is to ensure that you have your wallet access details in multiple, extremely secure, locations. He lost his because his details were only kept on a hard drive that was thrown away. Another option would be to use custodial wallet clients like those provided by Binance and Coinbase. This way, even if you lose access to them, these services may be able to retrieve them if you can prove without a shadow of a doubt that you are the original owner (potentially via KYC methods).