Step 1: Choose Manage -> Manage All Wallet
Step 2: At the MultiChain wallet you want to get the passphrase and private key, Select any Blockchain wallets.
Step 3: Choose Show PrivateKey & Passphrase
Step 4: Copy your Passphrase and Private Key
Note: Passphrase and Private Key are important information. Coin98 Wallet recommends that users backup this information after creating a wallet and not disclose it to anyone.