Coinbase is one of the largest Cryptocurrency exchange in the world. whenever, a coin is listed in Coinbase, It creates a storm in the crypto market. Listed in the coinbase exchange means that the coin is exposed to a lot of potential investors. As a result, generally, Coin prices jumps when the news of coinbase listing announced.

source:coinbase
Bitcoin Cash is the prime example of huge price fluctuation after listing at Coinbase. Though Recently, Investors does not react too much about the listing of Ethereum Classic. To me, It is a good sign. Crypto Market is volatile due to the fact of rumor, Fud etc. If investors becomes stable, Which is unlikely to happen soon, Crypto Market eventually will be stable.

Currently, Coinbase is supporting a few coins. In future, Coinbase will support number of coins and will be a hub of Cryptocurrency. Now it is supporting BTC, BCH, ETC, ETH and Litecoin. If you want to join, You may join from the following refferal link:

https://www.coinbase.com/join/59855da303132d00c9e78e44

"By combining blockchain with crypto-economics and a voting-and-governance system, you can start to create a new kind of community, or ecosystem." - Coinbase