Design is soemwhat good, what I will add tho is with this drop-down menu where we chose which currency we want conversation to be betwee to add some search functionality at top so that other people and me don't have to scroll till we find deisred coin. Another thing is that after conversation is done this centered area is shifted to left, something prob wrong with how grid is made.
Noted: Thanks for suggestion. It will be added in next version. ( There is search facility available in right top corner but it limited to single currency)