At first seeing an Instagram link in here appeared weird to me. I had to read it's content to know what it's about. This is kind of an off topic though, who else finds it weird talking about crypto on Instagram? Just doesn't feel like a platform for crypto talks to thrive.
Instagram is a social media, like every other social media and could be employed by a project for promotional purposes. Dreamr project like many other projects have an Instagram handle. From my observations, dreamr project tend to prefer the use of Instagram, that explains why most of the promotional events are held on Instagram.