It was a joke mostly because Bitcoin is legitimately innovative and Linkedin is yet-another-social-media-platform-except-for-Serious-Business. No one gripes about investing in stocks even though they (they being one of the biggest companies) can obviously tank 50% in one year. However, every post even remotely related to cryptocurrency will have, guaranteed, a comment or 10 about how "No one will ever invest in this because it is too volatile." It's just an observation of mine.