Clams are a 2 year old cryptocurrency that has some good qualities.
1. clams, if staked in a wallet, currently have a 37% interest rate.
It's dropping, it used to be over 50% and will eventually drop to a very low inflation rate. So now is the time to get some. The inflation rate is actually less than this because many many clams are not staking since they're stuck on Poloniex.
2. Clams are one of only 10 currencies lendable on Poloniex.
This give clams increased status and longevity in the crytpo world. Also, occasionally the interest rate on lending can reach 1%/day (1000's of percent per year when reinvested) making it useful to skip staking and lend on polo. This also means margin trading (shorting) is possible on poloniex, leading to a more stable currency with more trades happening. More liquidity.
3. clams are connected to shapeshift with a liquid market.
As are many currencies. But that's a good thing.
4. Just-dice is a dice game with clam gambling that has a very low scrape rate and is provably fair.
And I've won money there. Which is nice.
So buy clams and read more about them on reddit.