The most distinguishing feature is that it's private by default, the sender, receiver and the amounts are cryptographically hidden from uninvolved parties. Other than that

• Tiny fees - fees are only used to prevent spam, not to replace block rewards.
• Tail emissions - every block rewards the miner with 0.6 XMR ensuring chain security, keeping the fees low and the inflation predictable and small - forever approaching 0 but never reaching it.
• Variable block sizes - the block size grows and shrinks with the demand, allowing for more transactions when demand is high but still limiting spam.
• RandomX mining algorithm - ASIC resistant mining algorithm best mined with the CPU ensures fair access to mining and prevents big minig firms from taking over the mining process.
• Community and culture - the focus of most other cryptos is investing and speculation while monero's focus is on being the best private, uncensored, p2p money. Because of this while other cryptos encourage their users to HODL their coins, monero users are encouraged to save and also spend their coins, treat them like digital cash rather than something who's only purpose is to go up in price. In my opinion this culture leads to several things:

1. Business acceptance - many privacy centric services like VPN, VPS, e-sim, phone top up, gift card providers etc. accept monero. Usually any service that does, sees it at the top of the chart as the most used crypto, often more than all the other coins combined. Many open source projects accept it for donations as well, with similar findings.

2. Community built infrastructure - the monero community focuses on building the infrastructure around the idea of monero being digital cash. Things like xmrbazaar.com, a monero based e-bay/craigslist like market where you can buy/sell things for monero, kuno a monero based gofundme alternative for fundraisers, retoswap.com an instance of haveno, a decentralized, p2p monero exchange, monerica.com a repository of monero accepting business and other monero related things are designed with the idea of treating monero as money.

3. Price stability - because of the fact that monero is actually used for payments it's price is established through adoption rather than speculation which makes it fairly stable in comparison to the rest of the crypto market, thanks to this you can safely spend and receive monero without worrying that a month from now it will loose 50% of it's value. Of course, there are peaks and valleys often caused by the macro market movements like the recent few day pump to $800 and crash back to $400 but that's an exception rather than the rule, for the most part (excluding stable coins) it's one of the most stable cryptos out there with a slight long-term uptrend.

5 Years

All time