Vitalik Buterin announced that he keeps 90% of his personal cryptocurrency assets in the Safe (formerly Gnosis Safe) multisig wallet. Such wallets use the M-of-N approach, where a key is split into multiple parts with equal access, and you need a majority of them to work.
Some belong to you and the rest belong to other people you trust. Do not reveal who these people are, even to each other, Vitalik wrote.
This is how Buterin responded to a thread in X about the importance of self-storage of assets. More specifically, he responded to a post by an X user who fears that the biggest risk in using a hardware wallet is the owner:
You could have your cid stolen, lose it yourself or put it in a safe deposit box in a bank, and then hastily move to another country because of COVID.