What you'll actually want to do (per the wash-sales above) is to create an NFT and list it for 5 eth. Wait a week and if nobody bites then buy it from yourself. Then list it for 50 eth. Wait a week and if nobody bites then buy it from yourself. Then list it for 100 eth. Wait a week and if nobody bites then buy it from yourself.

Your NFT will have a record of rising value and appear more attractive to marks investors.