What it's Cardano? How works? Invest maybe ?

What it's Cardano ?
Cardano is home to the Ada cryptocurrency, which can be used to send and receive digital funds. This digital cash represents the future of money, making possible fast, direct transfers that are guaranteed to be secure through the use of cryptography.

Cardano is more than just a cryptocurrency, however, it is a technological platform that will be capable of running financial applications currently used every day by individuals, organisations and governments all around the world. The platform is being constructed in layers, which gives the system the flexibility to be more easily maintained and allow for upgrades by way of soft forks. After the settlement layer that will run Ada is complete, a separate computing layer will be built to handle smart contracts, the digital legal agreements that will underpin future commerce and business. Cardano will also run decentralised applications, or dapps, services not controlled by any single party but instead operate on a blockchain.
This is the first blockchain project to be developed from a scientific philosophy, and the only one to be designed and built by a global team of leading academics and engineers. It is essential that the technology is secure, flexible and scalable for use by many millions of users. Consequently, considerable thought and care from some of the leading experts in their fields has been devoted to the project and informed design decisions. The scientific rigour applied to mission-critical systems such as aerospace and banking has been brought to the field of cryptocurrencies, with a high assurance implementation. We believe this is the first time that this has been done.

A major innovation of Cardano is that it will balance the needs of users with those of regulators, and in doing so combine privacy with regulation. The vision for Cardano is that its new style of regulated computing will bring greater financial inclusion by providing open access for all to fair financial services.
It's good investement ?
Yes, because:

Reduces fees that exchanges charge
Allow quicker and easier transactions across the blockchain
Removes risk of a third party losing your cryptocurrencies
Cardano focuses on a few fundamental elements:

First blockchain to be developed from a scientific philosophy
Regulatory and Compliance focus
Scaleability
Cross Chain integration
Cardano is a good investment for the above reasons and the fact that it has only been on the markets since October.