(marketscreener.com) Peer-to-peer trading platform for collectibles and luxury assets launches first physically-backed NFTs of Casascius coins https://www.marketscreener.com/news/latest/4K-Platform-To-Offer-Over-18-BTC-in-Rare-NFT-Casascius-Coins--36745357/?utm_medium=RSS&utm_content=20211021
