MAIDSAFE is definitely one for the future. At the moment is is full of technical problems and the forum itself is not very friendly. This is why the price goes up and down like yoyo. I always buy when it goes very very low. It always goes up again.

DASH must be considered a good investment. It is a highly efficient service, even Roger Ver has recently used it which has sent a big signal. It also has a marketing plan that most corporations would kill for.

POT coin made me laugh at first but the idea behind it is not silly. When people buy canabis, even in state where it is legal, it means they have to carry cash. This leaves them open to being mugged. Paying online with POTcoin removes this danger. I bought some a while back. It recently went up and I made a small profit- It is still early days as yet though,

BURST is one of the most promising in my opinion. It is already being called "the bitcoin for the working class". It is still very early days but its revolutionary way of mining makes it the only real decentralised coin in the crypto world at the moment. This could be really big in the future, I would start mining rather than buying though.

This is only my own opinion and not financial.
Always research yourself and never take other peoples opinions as gospel.