There are more buried and dead coins then I can shake a stick at, even coins that have been around for awhile devalue extensively and never go back up... Library for instance.
LBRY has an active github and a betaversion of their LBRY-blockchain that works pretty good.
In the beginning after launch, the number of coins in a block increased rapidly and this caused a flood in the market, and a falling price.
Today the block has been reduced to 427 coins down from 500 and the decline will continue. $116 000 tradevolume in the last 24hours. I am keeping some and selling Zcash and Monero