To buy Bitcoin on eToro, follow these key steps:

1. Set up an eToro account by signing up on their official website, providing personal info, and completing verification as required by KYC regulations.
2. Deposit funds into your eToro account using methods such as credit/debit card, bank transfer, or e-wallets like PayPal.
3. Search for Bitcoin (BTC) on eToro using the search bar.
4. Place a buy order by choosing to "Trade" at the current market price or set a "Limit Order" to buy at a specific price, then enter the amount to invest and confirm.
5. Monitor your Bitcoin investment in your eToro portfolio.

This process allows you to buy Bitcoin directly on the platform with ease, even in fractional amounts, with options for fast funding and transparent order placement.