1) Blue chip NFTs like Bored Apes and CryptoPunks are far too expensive for the retail community to get involved. Platforms like fractional.art make Blue chips accessible to retail investors.
2)There is no way to short NFTs at the moment. NFT traders can only buy low and hope to sell high. nftperp.xyz is an example of a perpetual futures exchange for NFTs that tracks the floor price of NFT collections (in beta live on Arbitrum).