This contemporary and modern name is ideally suited to a finance, payment or cryptocurrency company.
The word "accountium" contains 10 letters and four syllables. Four syllable names are used by established brands like ESPN, Unilever and Airbnb.
Accountium.com is a dot com domain. Dot com domains are the most valued top-level-domain in the world, famously used by websites like facebook.com. Once secured, a dot com all but guarantees no-one else can outrank you for your own name in the long run.