One thing you must remember is that Social Media and Exchange Platform do have different purpose and ways to show certain data that would befit on a good UI/UX. Exchanges that comes with the idea of going in 'social network' like structure is often just a P2P platform, whereas it is common in various trading platforms as one of their feature. YET, you can have these unique ideas that were somehow complicated;
- A twitter-like platform that doesn't use retweets/reacts but rather 'Accept (like accepting an offer)' and reply for a social interaction with regards to an offer.
- A twitter-like that doesn't really post tweets, but rather a post like "Swap 116680 for 1BTC (Current price: 116672.75XRP/BTC)"
- Categorize posts by offers of trading pairs
- KYC required of course -- as an assurance and validity of the user.
That's all I can suggest. Hope you could get an idea from those that I've mentioned. Goodluck!