I wrote a post last year about why I was taking all my crypto out of coinbase and never using them again..this was at the stage before the Bitcoin Hardfork, when coinbase were not planning to pass on the BCH to BTC from the fork to their holders.
Well as you know coinbase ended up passing on the BCH this year and I even received a Bit from the Bitcoin I had in my vault and was not able to get out in time.
The Reason I don't hold large amounts of crypto in my Coinbase wallet is, for example...
I have 4.5 ETH in my Ledger Wallet at the moment and if I go to https://ethplorer.io and search my own ETH address it will show me all my ERC-20 tokens I have attached to that address, including airdropped And forked tokens.
So as of this moment I currently have
86 VIU tokens
.23 OMG tokens
483 XNN tokens
.45 Datacoin tokens
1 CAT token
All these tokens I received from airdrops or forks...
At the moment, probly only worth 20 or 30 bucks, although think about coinbase holding the private keys for millions of ETH wallets and most likely cashing in on all their customers forked and airdropped coins...
Plus the massive fees they charge to purchase crypto, it is no wonder they have had a billion dollar profit so far!
I still use coinbase, only because it is easy and convenient to get some ETH or BTC if I have an ICO to buy into or need to get some crypto quick..
Though once Robinhood comes into full swing i will be ditching coinbase and using Robinhood for my ETH and BTC purchases, as Robinhood have promised 0 fees to buy!
If you haven't already, use https://ethplorer.io and search your ETH address for potential coins you were not aware of, unless you hold all of your ETH in coinbase of course..... as my grandma used to say "tough titties" ...jk my grandma never said that..