That's certainly true, mate. While self-learning helps, it's always best to have some sort of certification or degree that will give credibility to your resume for employers to see. Still though, the ultimate indicator of your skills would be your portfolio itself than a certification or degree from an accredited institution. Mainstream universities and colleges could start offering Blockchain-related degrees in the future, if the need arises. After all, they wouldn't want to miss an opportunity of making money. There's an online university out there called "Woolf University" which is based on Blockchain technology. It offers many degrees that are well-known in the real world today (although they don't offer Blockchain degrees yet).
Nonetheless, I believe that most Universities have been skeptical about offering Blockchain-related courses as content can be found easily online. There are a wide array of educational materials available at your fingertips online for free, which can help you turn into a professional quickly without the need for a degree. Today's most prominent figures in the crypto space (Vitalik Buterin and Andreas Antonopoulos) don't have a Blockchain-related degree but they're still considered experts in the industry. Which means that you don't necessarily need to go to a University or College to become successful in the field of crypto and Blockchain technology. Just my thoughts