Monero has multiple standout features making it unique from most other cryptocurrencies.
It is entirely anonymous and private, unlike its counterparts Bitcoin and Ethereum, which lay bare their blockchains for everyone to take a look at.
It is also truly fungible - a characteristic every ideal cryptocurrency should have, but is, unfortunately, lacking in many.
Monero is also more decentralized since its CryptoNight algorithm helps in keeping ASICs away from Monero mining. This makes it a more equitable technology, and more resistant to power grabs from resourceful miners with powerful machines.
Faster: A block is added to Montero's blockchain every 2 minutes, compared to the far larger 5-10 minutes Bitcoin takes.
You can buy Monero by comparing prices offered by many leading exchanges from CoinSwitch.