Is Couchbase safe for banking system?

To put it straight: Can counchbase be used as the main database for banking system or e-commerce system where you deal with money?

It’s a talk about ACID here and transactions.

CLASSIC EXAMPLE:
User transfers money:
money has to be substracted and then added to other account( 1 transaction)

Customer buys item on e-commerce:
it’s the same, part of 1 transaction…

Can couchbase serve as complete relational database replacement in a system with a lot of relations and a lot of transactions providing at the same time better performance, scalability and consistency and all that it promises?

Because of course relations are used in 90% of applications.

There are many use cases on your website but they’re not precised and maybe they just use it in connection with some RDBMS.