Also, there are very awesome projects at preico stage. Take æternity, it's one of the more promising projects and they are just launching the campaign for march 31. It's like having again the opportunity to buy btc back in 2010.
3 that you said are POS, which are more like Ponzi of Scheme to me, it's not hard to see why their price are so stabilize because only few person who own this and unlike other type coin this POS actually doing nothing but collecting dust in their owner wallet. for me no matter how high any alt coin but if it's non mineable or majority are not by mining then it's A BIG NO NO