How to Sell blue eyed dog (BLUE) for Sponge (OLD) ($SPONGE) in Portugal

To sell blue eyed dog for Sponge (OLD) in Portugal, first, find a cryptocurrency exchange that supports the BLUE/$SPONGE trading pair. Create an account, verify your identity, and deposit your BLUE into your exchange wallet. Locate the BLUE/$SPONGE pair on the trading platform and place a sell order to exchange your blue eyed dog for Sponge (OLD). If the BLUE/$SPONGE pair is unavailable, you can first sell blue eyed dog 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.