By Today Dated 16 Dec. 2018 GMT 7.20AM I tried to check domain Bitcoinonlinedigital.com. But it seems down.
So check for WHOIS of this domain so I found this domain is expired and available for buying via Whois.com.
So as I don’t have even check website. But still I can give my own review about this domain as its just domain used to attract users closely interested in Bitcoin and Digital Currencies. But due to regulation and price volatility of price of BTC website owner might be take down this domain.