Monero's exact use case is private digital cash. Send, receive, earn and spend money worldwide and without restrictions. No bank account, government ID or permission required. As private as a physical cash transaction.

Monero's inflation rate is currently 0.87% (currently less than Bitcoin and gold, and much lower than fiat) and will trend toward 0% over time (disinflationary). More info here: https://i.ibb.co/G9YM10T/Monero-Supply.png

In addition, some Layer 2 implementations for Monero are being discussed, but right now, it isn't necessary because TX fees are less than 1 cent, blocktimes are 2 minutes and 0-conf TXs are relatively safe (there is no replace-by-fee in Monero).