A hardware wallet is a physical device that stores your private keys and allows you to securely manage your cryptocurrency assets. It is designed to protect your funds from hackers and other potential security threats. To use a hardware wallet, you typically connect it to your computer or mobile device and enter a PIN code to access your funds. You can then send and receive cryptocurrency transactions using the wallet's interface.

As for threat actors, they can pose a risk to your Bitcoin if they are able to gain access to your private keys through social engineering or other means. It's important to take steps to protect your private keys, such as using a hardware wallet and being cautious about sharing sensitive information online.