Bitcoin is the best cryptocurrency for .onion sites — it’s easy to obtain, and you can use and store your Bitcoin on secure .onion pages. It has become the Dark Web’s native currency, and since it has grown far beyond the Dark Web, it’s easy to buy even on the surface web.
If you buy bitcoin on the Surface Web, your identity will be exposed, and you won’t be able to purchase anything through the Dark Web without being traced. Plus, buying Bitcoin from other Dark Web users is a bad idea, as you open yourself up to potential scams that could lose you a lot of money.
Another option you can try is coin mixing, a Wasabi Wallet feature that allows you to hide your Bitcoin transactions by mixing them with other transactions along the blockchain. However, you still need to be cautious when buying products and services on the Dark Web and should always connect to a VPN before accessing Tor.