Tell me,which new altcoin is worth mining??
Which do you think is worth investing??
For speed in transactions confirmation I think you can invest in eth related coins like creditbit which has been existing since 2015. The coins is currently trade in livecoin website you can also do more research by using google as they are many articles on the opportunity this coin provides.
It is always happening, some people will come with some random altcoins and talking about investing with it. Most of the time they are newbie or they are wearing corresponding signatures. No wonders as I can understand.
Basically I'm not recommending mining any cryptocurrency as it needs continuous re-investments to stay competitive along with raising difficulty levels. But investing into highly established altcoins is a thing I'm always doing and recommending it but only with carefully chosen altcoins.