Blockchain space has gained tremendous public attention in the last few years. It quickly leads the crowd to field, whereas most newbies have no clues how to start. This explains why most people unintentionally ignore the importance of asset ownership.
Indeed, decentralization redefines the whole concept of ownership by eliminating the middle man, granting owners full access as well as authorization over their assets with one single Private Key.
It means users must be the owners of their Private Keys. If the key belongs to someone else, or to another party, it will be their assets to be used instead. The huge collapse of FTX is a vivid emphasis for the importance of self-custody on a non-custodial wallet.
Not your key, not your coin.