How to Sell BlockProtocol (BLOCK) for Sponge (OLD) ($SPONGE) in Portugal

To sell BlockProtocol for Sponge (OLD) in Portugal, first, find a cryptocurrency exchange that supports the BLOCK/$SPONGE trading pair. Create an account, verify your identity, and deposit your BLOCK into your exchange wallet. Locate the BLOCK/$SPONGE pair on the trading platform and place a sell order to exchange your BlockProtocol for Sponge (OLD). If the BLOCK/$SPONGE pair is unavailable, you can first sell BlockProtocol for a stablecoin like Tether (USDT) or a fiat currency such as the Euro, then trade that for Sponge (OLD). Be mindful of potential exchange fees, which vary by platform and can affect the total amount you receive.