Any of the exchanges you used to buy your SFI tokens are also a place where you can cash them out. Remember, not all of those platforms may offer you the option of exchanging them directly for fiat currency, in which case you would need to swap them for crypto with better liquidity before you can exchange them for EUR, USD, or GBP. The peer-to-peer transaction would be the faster option, however, as it does not require a middleman. In this transaction, you would simply send the SFI tokens to another individual and they would transfer the agreed amount in fiat currency to your bank account.