@zengjiajun_eth Don't think optimizing the contract would help. Regardless of contract details, tx fee goes up until list price + tx fee = market price. If gas usage per purchase decreased 2x, the equilibrium gas price would have just been >12000 gwei instead of 6000.
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World of Warcraft, Lineage 2, Runescape, ... all were metaverse. A metaverse is nothing else than an MMO with social and economics. The blockchain layer on the top of it is just the logical continuity but should never be the focus of how immersion is created.
If you think you have not been programmed by the myths (memes) of your family, country, schooling, employment and religion, you probably have not examined yourself carefully enough.
Alternatively, you are super human.