Almost all cryptocurrencies (including Bitcoin and Ethereum) are transparent. They reveal your entire transaction history to the world.
Monero uses unbreakable cryptography to ensure that no one can see how much money you have or where you spend it, even if they know your wallet address.
The source of funds in every Monero transaction is untraceable, and the transaction amounts are confidential. Always-on privacy means that every Monero user's activity enhances the privacy of all other users.
Because funds on the Monero blockchain are untraceable, they cannot become tainted by association with their previous owners. This means you can accept Monero without risk of the funds you've received being blocked or censored at currency exchanges or merchants.
Monero's Kovri project (coming soon) encrypts and routes transactions through the I2P Invisible Internet Project nodes to hide your IP address and protect you from network monitoring.
Over 240 developers have contributed to the Monero project, including 30 core developers. Forums and chat channels are welcoming and active.
Monero's Research Lab, Core Development Team and Community Developers are constantly pushing the frontier of what is possible with cryptocurrency privacy and security.
Monero is not a corporation. It is developed by cryptography and distributed systems experts from all over the world that donate their time or are funded by community donations. This means that Monero can't be shut down by any one country and is not constrained by any particular legal jurisdiction.
There are no multi-day holding periods and no risk of fraudulent chargebacks. It is safe from ‘capital controls’ - these are measures that restrict the flow of traditional currencies, sometimes to an extreme degree, in countries experiencing economic instability.