Bitcoins are now used for exchanging currency, services, and products. Initially, in 2013 the significant users are 300, 000 to 1.3 million users. Later on, the merchant has also started to accepted the Bitcoin and on 2015 merchant accepting Bitcoins is raised by 100,000. Cambridge University has estimated in 2017 that there are 2.9 to 5.8 million users are know using cryptocurrency wallet i.e. Bitcoins as digital services.