It's like any other PoS coin, there is no max supply because of the staking interest; inflation is never unlimited, it depends on the amount of staking rewards; it can be negigible, it can be a lot; we have currently 20% PoS reward (that's not the inflation itself which is a lot lower), with the new consensus protocol it will change to 1% p.a., we're in public testnet, roadmap is on our website stealth.org for details, as well as the whitepaper