Thank you for bringing up
Cardano. It's not that Cardano is being undervalued, I just think they lack marketing. For the past month Cardano price went up from $0.08 to $0.12 today.
Cardano is one of the most promising coin out there which there is no marketing for ADA coin, it is one of the topmost coins which constantly increasing it's the price whenever there is a demand for this coin. ADA is in many people, which they need to hold this coin because, in 2017, the price of ADA coin reached more than 1$.