XDN Currency has a special network that respects the privacy of Bitcoin and many other currencies. For example, in the digitalnote network, only transactions can be seen by the sender and receiver, which is a great advantage.
The second XDN feature I like is that the digitalnote network uses a combination of both PoS and PoW algorithms, which makes it more secure than similar networks.
The third feature of this project is that it has been active for about 6 years and its age makes it able to remain one of the most important cryptocurrencies in the long run.