> Coinbase may cancel or reverse potentially high-risk buys or sells of bitcoin, including those made using reversible payment methods.
Could very easily be that your transaction was flagged and then reversed. Your BTC was returned in full. If the price had gone in the other direction I doubt you would be offering to compensate Coinbase for the difference.
coinbase has been overwhelmed with increased volume and rapid fluctuation in the last two weeks. As staunch has said, to have only lost time in the transaction process and missed chances to get in or out at a particular price was an inherent risk in placing the transaction in the first place.
I have also been held up by coinbase delays in transactions over the last few days (though nothing was reversed), so I empathize with the pain. If you know of a more reliable and more quickly servicing online bitcoin exchange, I know many who would be happy to hear about it.
Yes, that's slow, but they gave you back all your Bitcoins. I get that you're disappointed about losing money trying to trade Bitcoins, but if this is how you react to this relatively minor problem you should not be trading Bitcoins yet. Problems like this are the norm right now.
> Coinbase may cancel or reverse potentially high-risk buys or sells of bitcoin, including those made using reversible payment methods.
Could very easily be that your transaction was flagged and then reversed. Your BTC was returned in full. If the price had gone in the other direction I doubt you would be offering to compensate Coinbase for the difference.