If you can mention 5 unique features of Solona that are not found in any other cryptocurrency and it has a good amount of decentralization, then I will believe that it is not a dead currency and that it is undervalued.
Solona is one of the simple networks that has a good record of stopping during the last two years. The network is completely centralized, there is no real development compared to the L2 projects on Ethereum, which have become faster and cheaper POS and its reliance on a decentralized network. All of these are reasons that make token developers use different blockchains, and therefore Solona disappears with time.