But, they do not really sell it for bitcoin, because Bitpay will convert bitcoin into fiat currency and give it to Asto plaza devs.
Through a partnership with Knox Group (http://knoxgroupplc.com/) and the bitcoin payment processor Bitpay (https://en.wikipedia.org/wiki/BitPay), a selection of 1,133 studio, one- and two-bedroom apartments, ready for completion by September 2019 will be sold for bitcoin.
Not in 2017, but have to wait for another 2 years which bitcoin price may reach new ATH. Yes, there is probability bitcoin will go down, but the chance to rise up is bigger obviously.

Currently, studio properties will have a starting price of 33 BTC, and the real estate agency says early investors will get additional benefits. Additionally, packages of interior design services and furniture can also be purchased using bitcoin.
BTC33 today worth over $151,000. How if bitcoin rise to $15,000 in 2019? It's not worth to purchase it right now.