No, that's not important at all or called "the best".
The best purpose of storing your coin is to have better security for your valuable asset and always remember the golden rule of crypto space "Not your keys, Not your coin".  When using a custodial wallet, you are relying on the wallet provider to securely manage and protect your funds. You don't have direct control over your private keys, which means you are placing trust in the custodian to act in your best interest.