Seems interesting. But im usually hesitant when suddenly a bunch of threads pop up about the same coin claiming it to be the next big thing. A pump and dump coming? Or me being paranoid? Even if the project is great the market can still be manipulated.
It's saavy to be cautious when a coin gets hyped, but im just pointing out the facts.
As an altcoin, if you want to compete against bitcoin, you need to:
1) Have a technological improvement so big that it becomes a treat model for the BTC status quo (people would find it safer and so on)
2) That you have massive merchant adoption
Monacoin obviously doesnt introduce anything remarkable at a technological level, but name me another altcoin that actually gets used in shops, websites, for tipping etc.
Im not saying go buy it right now, it was a buy when it was flat (as all investments), now it's yet to be seen if the growth can be sustained, but I would keep an eye. Japan is releasing their own crypto currency for 2020's olympic games and Mona may pump heavily again.