The price is surprisingly easy to predict based on the previous rallies.
However there might indeed be a blackswan event that will drive the BTC to 700 000 USD at this rally. The probability for this is perhaps 5 % or less.
I'd like to see coinbase keep up with that demand.
"Due to volume, we are unable to fulfill instant buy orders. However, you may purchase now and your order will be fulfilled in six months. Thank you for your understanding."
LOL. But seriously, they need to sort out their coin on-demand purchasing issues before the next rally. It's unbelievable that they were able to get away with that crap, when literally tens of thousands of coins per day were being traded on the exchanges during the peak of the last bubble. Otherwise, it'll create an opening for U.S. based competitors to come along who can solve that problem. I actually believe it was their way of trying to control the market demand, eliminate using Coinbase for day trading, and reduce market volatility, which no unbiased free market "coin broker" should really have the right to control. But they can get away with it for now, being the only game in town (in the U.S.)
And what's worse is, after five months and 29 days of waiting, an e-mail will come, "your transaction has been flagged as potentially fraudulent and has been cancelled."