Pinned message suggestion

Hey guys,
So lately I've been finding myself wishing this feature existed on a regular basis. Basically, my vision is that group admins will be able to pin up to 3 messages on the group. You will be able to do so by holding down on the message until it's highlighted, and then in the top bar you can choose a button to pin the message. Pinned messages can be viewed by clicking a button in the top right. It will be a button like the one in the bottom left when you need to go to the bottom of a chat. When clicked it will uncolapse the messages. The button will always be there to click.
This feature could be very useful for school and trading groups which I have.

Thanks