I don't even understand why an image of NFT is traded at a very high price, I'm afraid this is only a trend for now, when this trend ends the NFT price could fall very much.
Maybe you don't know what NFTs are and why does it trended so much. Start first on searching what NFTs then you'll see what value lies behind such project. But let me give you a little idea.
NFTs are basically just crypto coins/tokens, but not FUNGIBLE (meaning cannot be interchangeable). What does it stores? Codes of course in contract, which contains the ownership. Most common example that resembles NFTs are Land Titles, In-game Skins, or even your PVC printed ID. Why does it prices so much? Because most NFTs that are successful has USE-CASES in it - where holding one NFT could either your ticket to their events or help people in charity events. It isn't a trend FOR NOW. Cryptocurrency started like this where most thought of it as a scam. It's just that some NFTs rugpulls as well like a normal token project.
Amongst those, I don't really know those but keep in mind these factors before you invest in any of that: Use-cases, Community, Roadmap, and Developers. An NFT project must have a great use-case whilst having it inline in their roadmap with the community being real people and supportive as the Developers is both doxxed team and active in publicly announcing their development and activities. Lastly, there are redflags to consider such as lowering the supplies as they get closer to minting date and a busy team
(coz they should sell their reputation even on the development stage)