There are several ways to buy Bitcoin without the help of a bank. Here are some of the most common options:

Peer-to-peer (P2P) Marketplaces: P2P marketplaces like LocalBitcoins, Paxful, and BitQuick allow buyers to directly connect with sellers and purchase Bitcoin using various payment methods, including cash, gift cards, and bank transfers.

Bitcoin ATMs: Bitcoin ATMs are machines that allow users to buy Bitcoin with cash or debit/credit cards. These machines are becoming more common and can be found in many major cities around the world.

Online Exchanges: There are several online exchanges like Coinbase, Binance, and Kraken that allow users to buy Bitcoin using various payment methods. However, these exchanges may require users to link their bank accounts or credit cards to make a purchase.

Bitcoin Vouchers or Gift Cards: Some services allow users to purchase Bitcoin vouchers or gift cards that can be redeemed for Bitcoin. These vouchers or gift cards can be purchased in stores or online using cash or other payment methods.

It's important to note that buying Bitcoin carries risks, and it's essential to do your research and only buy from reputable sources. Additionally, it's important to keep your Bitcoin secure by using a secure wallet and taking other necessary precautions to prevent theft or loss.