What types of offline storage options are available for cryptocurrency holders?
As a cryptocurrency investor, I'm always concerned about the security of my digital assets. Could you elaborate on the various offline storage options available for cryptocurrency holders? I'm specifically interested in understanding the differences between hardware wallets, paper wallets, and cold storage solutions. I'd like to know about their respective advantages, disadvantages, and how they ensure the safety of my coins in the event of a cyberattack or hacking attempt. Additionally, I'm curious about the ease of use and portability of these options, as well as any recommendations you might have based on your professional experience.