Now you're quite screwed, while coinbase has taken a profit on this (and probably other) deals by delaying these settlements. And what are you going to do if yo

Now you're quite screwed, while coinbase has taken a profit on this (and probably other) deals by delaying these settlements. And what are you going to do if you don't get all the losses covered? Your options are quite limited. Do we know that this was case of Coinbase taking a free option, versus incompetence? My thought... If they lock in a price, they are taking a risk. There's no risk-free arbitrage. They could wait and hope for the price to go down, and make some money, but they'd also owe money if the price went up. This does harm the customer, but if it's not a daytrading platform, you can't fault them if they honor the original price no matter what direction it turns. The real concern is if this happens to a lot of trades at once, the firm could go out of business honoring the original price.