People who are trying to assign Internet Protocol (IP) addresses to devices on a network are often consumed by the question of whether to get static or dynamic IPs. If you're trying to sell IP addresses, though, keep your eyes on another decision that people will eventually have to make: Network Address Translation (NAT) versus one-to-one IP address setups. If you have any NAT addresses that you can spare, you may want to set them aside for potential sale because eventually, people will have to use NAT more and more.
Dwindling IP Addresses
People need IP addresses in order to do anything on the Internet, and as more devices start accessing the Internet, demand for addresses will increase. However, the number of available IP addresses is dwindling. This has led to the creation of NAT, in which several devices (usually a bank of computers, such as you'd find in an office) are connected to one IP address that serves as an umbrella with ports used as extensions (so each computer ends up having something resembling its own IP address). That one address allows each computer to reach the web without requiring addresses of their own, so you can see how helpful that can be as available IP addresses become scarce.
Normally each computer would have its own address, a type known as one to one. But that creates a problem as companies expand or start up. There will be more competition for these addresses, and if you can offer an alternative in the form of available NAT addresses, you could create a loyal customer base that may refer others to you.
Available as Both Static and Dynamic
Network Address Translation is available for both dynamic and static setups, and the advantages and disadvantages are generally the same for NAT as they are for one to one. Static setups are good for companies that need customers to always be able to access the company's servers while dynamic setups tend to have better security because of the ever-changing IP address.
Really, all that is happening with NAT is that the main IP address acts as a doorway for several computer connections. However, that condensed access is going to become vital for Internet access in general as more people try to connect. NAT is already used by many companies, but as more companies start up, there will be more demand.
Visit sites such as IPTrading.com to look into your opportunities.