Custodial vs Non-Custodial Wallets
In a custodial wallet a third party (like an exchange) holds your keys; in a non-custodial wallet only you do.
In depth
Custodial services offer password resets, customer support and easy trading, but you are trusting the company’s security and solvency. Non-custodial wallets give you full control and full responsibility — there is no one to call if you lose your seed. Many users hold trading balances custodially and long-term holdings non-custodially.
Why it matters
Your StableX account is custodial — understanding the trade-off helps you decide how much to keep where.