I personally like MomaCoin, they have solid Japanese community, who tends to more patient and loyal, so that sudden price drops wouldn't hurt that much.
Yes, MonaCoin is very promising and I think it's a good buy. It's one in my list of 20 coins I've been monitoring over the past 3 months and that includes Bitcoin, of course, Ethereum, Bitcoin Cash, Litecoin, Monero, Waves, and LEOcoin among the few.
Today the currency market is very wide, there are several good currencies to make a hold. I would personally advise Mnx Coin, in addition to being highly valued in recent days, it has a very interesting park system with a large percentage of earnings. As they said on the topic, Waves and another one with a lot of potential and currently is a bit discredited, but that has a great upward trend, not to mention that many currencies that are coming out in the market today are using their base in their project.
MNX is potential coin but the price was pushed up a lots. I think new investors to MNX should be patient.