You can't really call something undervalued or overvalued based on the dollar value of one coin/token. With a supply of one million tokens, it would definitely be undervalued. With a supply of 100 billion tokens it would probably be overvalued. I'm not saying it's not undervalued, it just took a long time for you to even mention the market cap which is THE number that tells us the valuation of any crypto project.
RE: DigiByte: With lightening transactions and scalability, this is one coin that has to be in any budding Cryptocurrency Portfolio. Currently at $0.038040.