How to Sell Omni Network [Old] (OMNI) for Cardano (ADA) in Portugal

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