Be careful! These scammers tried to blackmail me, and then they tried to blackmail the business consultants I hired to investigate them.
Abdullah Al Gosaibi and Denzel Clark are most likely fake names, and the company "Al Gosaibi Capital" formaly registered and against it there are many serious investigations of fraud in numerous European countries.
Scammers will ask you to make a deal for to sale/buy real estate, but then you will be offered all payments to be in cash, and if you refuse, they will try to blackmail you. You'll be threaten to loose your good reputation. Do not let that spoil so stupid!