It's a pity that some projects with great team effort and development still have very poor prices due to current market situation. Take a look at ETH which once touched 1400$ is struggling below 200$. Also coins like WAVES with great updates still do not have good price performance. XLM and NPXS too are supposed to make their holders rich by now, but the reverse is the case (maybe their very large total supply is affecting them negatively).
This may be largely attributed to the long-standing bear market of 2018. Bitcoin and other cryptocurrencies were greatly affected as prices started to decline massively across the market. Even if development is growing stronger than ever, prices are still low these days. Since most people associate crypto's success with its pricing, they believe that the whole industry is failing. But we as crypto enthusiasts know that this is just a misconception of how crypto behaves across the market.
There are many good coins out there that are undervalued these days, considering their proven track record of development and innovation. Ethereum is one of the best altcoins in existence right now, and it has suffered from a constant decline in price. Being worth over $1,000 per coin to just hundreds of dollars shows us how severely the bear market affected even the most prominent coins in the mainstream world. On the bright side, development is still on-going for most altcoins we know and love today. Ethereum has recently experienced a hard fork which improves transaction capacity a little. While prices haven't increased that much, it's an undervalued coin that's worth investing for the long term. Other coins like WAVES and XLM are good too, with unique technologies that allow people to trade tokens or other cryptocurrencies without a middleman (decentralized exchanges), as well as, blazing-fast transaction confirmation times. What kills them is their total supply, though.
Litecoin is another great cryptocurrency that's largely undervalued these days mostly because of its limited supply relative to Bitcoin. With only 84 million coins that will ever be created, Litecoin should've been a lot more valuable than what it is right now. Still, development is on-going and the community is expecting to adopt Mimblewimble soon. In the current bear market, it's best to accumulate as much undervalued coins as we can for future safe-keeping. Before you know, prices will rise once more, allowing you to reap huge profits across the crypto market.
Nonetheless, time will tell us whenever there will be interest from everyday people into most cryptocurrencies that are undervalued these days. If there's lack of demand, then expect their prices to go lower over time. Development might still go on, but lower prices will make matters worse for people who use these cryptocurrencies for daily payments. Just my thoughts