Coinbase is probably in it for the long run, and they are probably doing things to enable them to outlast the competition.
However.
On Monday I was planning to place an order for bitcoin on Coinbase and I was informed that the order would go through on Friday at the market rate at that time. That is somewhat worthless and extremely dangerous in a volatile market. For now, I consider their service unusable.
It's been that way for a while. I'm hoping they change the way that works, as right now the only way to guarantee you'll get a buy order in is to use a tool like coinbase-trader(https://github.com/martindale/coinbase-trader), literally polling their API until it goes through.
However.
On Monday I was planning to place an order for bitcoin on Coinbase and I was informed that the order would go through on Friday at the market rate at that time. That is somewhat worthless and extremely dangerous in a volatile market. For now, I consider their service unusable.