Passage: Financial technology, often shortened to fintech, is the technology and innovation that aims to compete with traditional financial methods in the delivery of financial services. It is an emerging industry that uses technology to improve activities in finance. The use of smartphones for mobile banking, investing services and cryptocurrency are examples of technologies aiming to make financial services more accessible to the general public. Financial technology companies consist of both startups and established financial institutions and technology companies trying to replace or enhance the usage of financial services provided by existing financial companies. Many existing financial institutions are implementing Fintech solutions and technologies in order to improve and develop their services,  as well as gaining an improved competitive stance.

Question: What form of technology has become widely used for financial and cryptocurrency transactions?
smartphones