Their coin may be going up in value, but let's face it, it almost couldn't go down anymore... but their project is on life support.
After their ICCO failed to sell almost any coins, their wallets no longer syncing, the developers no where to be found and the github hasn't been touched in 2 months... it seems that DigitalNote may not be a top priority for whoever was working on it. I would not put much faith into this project.
Please research further as we should not be backing projects that offer no value to the community.