Ethereum

"Users constantly put their trust in other people, products, and computer programs. They accept using blockchain command-line-interfaces, wallet software and devices, centralized platforms, smart contract code, decentralized applications, and all the various wallet connection integrations in between. Each touchpoint adds risk; the sum of all these interlocking parts shatters the illusion of the non-custodial wallet."

"Users constantly put their trust in other people, products, and computer programs. They accept using blockchain command-line-interfaces, wallet software and devices, centralized platforms, smart contract code, decentralized applications, and all the various wallet connection integrations in between. Each touchpoint adds risk; the sum of all these interlocking parts shatters the illusion of the non-custodial wallet."

https://a16zcrypto.com/posts/article/wallet-security-non-custodial-fallacy/