Profits in Bulk domain registrations

Whether we can earn more money by buying the domain names in bulk and sell it after some years?

I believe that main profit of doing that is lower price for the 1 domain name registration only.

I have saved a good sum of money while registering domains at Eurodns.com in bulk..
if you are looking for a good company to register domains, highly recommend them..

I think the profits on bulk domain registration are from the discount available when you register ,not buy in bulk with the hope of selling them later in higher prices