You should investigate, there is always coin which can pop up from mass in the future but you need time to find right one. I stopped mining before 3 years but still have some old coins which are now up You should think for long term, not medium of low. But it's hard to find coins which will be much more expensive than today. ETN may be but you will need to wait months and you can easy gain 10-15x but be patient. That's my opinion, one coin, there must be more like that one.