There is still the possibility to think outside the box. What else could people bank in the cloud? Information. Data.
A bank can keep something other than money. But this bank is in the "cloud" - virtual machines with special, transferable, filesystems such as LVM. So it couldn't bank horses or houses. But it could bank horse names or house numbers - silly examples but you get the meaning.
To get any kind of decent return on it you need to come up with good ideas of who could use it profitably. Not just any old thing you think might work. You need to think it through fully so you can justify the asking price to an end user and answer their questions. Then you need to find enough end users to have a good chance of one of them saying "Yes" at a price that is good for you.
You see why it is always better to have a sound, business based, reason for buying a domain before you spend the money? It can be hard work to recoup that money after the fact.