Is the Bitcoin I buy in Moneda real Bitcoin?

Your position is backed 1:1 by Bitcoin, but what you hold on Base is a token called cbBTC, issued by Coinbase. Coinbase holds the actual BTC in custody and issues cbBTC against it, which is what lets Bitcoin settle on Base in seconds for cents. Moneda shows it as "BTC" by default because that is the exposure you have. If you would rather see the exact on-chain token, turn on "Wrapped token tickers" in Settings > App settings and it will read cbBTC everywhere. The practical difference: alongside Bitcoin's price risk, you are also trusting Coinbase to keep honouring redemption.