# Buy Tokens on Bio with Fiat

This guide explains how to acquire tokens in the Bio ecosystem (BioAgent tokens like $AUBRAI, BioDAO tokens and soon IP-Tokens) using fiat currency (USD, EUR etc.).

**Step 1: Buy ETH with fiat**

ETH is the easiest starting point for purchasing Bio ecosystem tokens on the open market.

**How to buy ETH**

1. Create an account on Binance or Coinbase
2. Add a payment method (credit card or bank account)
3. Buy ETH using your payment method

**Step 2: Move ETH to the Base Network**

The Bio ecosystem operates on Base, so you need ETH there before you can buy tokens. 

How you bridge depends on where you bought ETH:

**If you bought ETH on Coinbase**

* Withdraw your ETH directly to Base (select “Base” as the network when withdrawing).

**If you bought ETH on another CEX (like Binance, Kraken etc.)**

* Withdraw ETH from the exchange to your personal wallet (e.g. MetaMask).

**In MetaMask, open the Bridge option.**

* Select Ethereum → Base and choose ETH as the token.
* Confirm the transaction. Once it’s done, your ETH will appear on Base.

**If you used fiat on a DEX that supports Base**

* Choose Base as your destination network during purchase.
* ETH will arrive directly in your wallet on Base with no bridging required.

**Step 3: Swap ETH for Bio Ecosystem Tokens**

Once your ETH is on Base, you can swap it for the token you want:

* Go to the [Bio app](https://app.bio.xyz/portfolio)
* Connect your wallet (MetaMask, Coinbase Wallet etc.).
* Choose the token you want to buy ($AUBRAI, BioDAO tokens or soon IP-Tokens).
* Swap ETH → the token.
* Confirm the transaction in your wallet.

⚠️ Always double-check you’re using the correct contract address to avoid scams.

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