Online shopping has increasingly become a habit of consumption, along with the growing development of new technologies. E-commerce conquers, every year, more and more new consumers. The parallel emerging of online marketplaces such as Amazon, Ebay, Aliexpress that drive its competitors to innovate constantly, are factors that, certainly, will further boost...

From the birth of bitcoin in 2009 to date, we have witnessed a rapid evolution of cryptocurrencies and the spread, throughout the world, of an increasing number of stores that accept payments with bitcoin or other cryptos, affecting more than positively their scalability. Examples are large chain stores in Spain such...