Plenty of webmasters rely on donations to keep their website going strong. You can always use PayPal to receive support from your visitors. Cryptocurrency donations are also worth trying. AltCoin DonationBox for WordPress is one of many plugins you can use get started with that.
This is a simple shortcode you can use in posts, pages, and widgets. It has a responsive design and lets you accept Bitcoin, Litecoin and Ethereum payments. Simply add your addresses in the backend, customize the colors, and you are set. You can also check your balance in the backend.
In order to get started, you will need to have your wallets set up or have joined a cryptocurrency exchange already. This is a paid script.