Marinecoin. A digital currency was born very long.
Marinecoin (MTC) was on the CMC in 2014 and stopped working in 2015. "I do not know why they stopped working."
But right now they come back and offer incentives to those who want to join the Marinecoin.
When you join Marinecoin you must register for a F1 account and verify your F1 account successfully. The reward for that is 450000 MTC will be added to your F1 account. You can also trade on F1 trading platform.
Good luck!!!