Hello! I recently "supplied" my WIN tokens in Just... @officialjustlend

The JWIN tokens you received after supplying your WIN tokens in Justlend are essentially a receipt of your asset. As such, it is important to keep these tokens safe and secure as they are your proof of ownership. You cannot do anything with the JWIN tokens themselves, as they are not a form of currency or a tradable asset. If you were to lose the JWIN tokens, you would effectively lose the money you supplied in the form of WIN tokens. Therefore, it is important to store the JWIN tokens in a safe and secure place, such as a secure digital wallet.

Nothing. jTokens are receipts of your supplied asset. Lose the token and you'll lose your money.