When prices go up, people net win because the world is net long.
When new coins are minted, *if you treat their current price as fair*, then they went up a _lot_ (from 0), and all of that price increase is net gain that can be split between users.
this can also create a food chain -- one person makes money by minting a coin, another buys early and sells later, a third arbs the second for a few bps, ...
and they end up splitting the total market cap of the newly minted coin