Recently Coinbase compiled a massive list of coins by looking at transaction numbers and user experiences with them. These coins have all been added into the "tools" page of Coinbase with a favorite button. It's a bit obvious this could be a silent vote page to see what coins Coinbase users enjoy.
If you would like to, go to Coinbase.com, sign up and favorite Steem under this link.. I have suspicions that Coinbase may be gathering analytics for coins via their own home website. Meaning that this data may or may not influence future decisions on adding coins to the trading market.
This isn't the only step Steem needs to take for Coinbase to adopt it. Steem needs as close to 100% up-time as it can possibly get. The past 6 months haven't been the best, with bandwidth attacks, fork freezes, and even a negative vesting withdraw being passed through RPC's.
Make sure you "vote" or "favorite" Steem if you enjoy the interactions you have had on the blockchain.
Making the Steem blockchain more reliable is something, in my opinion of course, that is required in order to get the large investors into Steem. These investors are needed for SMTs, and the next level of user adoption. Pushing ahead and achieving a high rate of reliability for DPoS is a crucial step in bringing Steem's revolutionary payments and currency distribution to millions of waiting hands.
Consider voting for DPOS witnesses who move the needle forward and verify new code as it ensures the sustainability of the blockchain. You can vote for me as a witness on Smoke.io's fork of steem here under the name "graylan".