We do not recommend it.
Although we endeavour in security, it is not assumed that BTCBOX will be used for long-term storage instead of the wallet.
As the nature of cryptocurrency is different, Securities company account or FX accounts should not be used instead of bank accounts.
Please understand it as only an intermediate custody while trading.
As for the Bitcoins that will not be used for trading, please transfer it into your wallet and store it by yourself.