Physical cash is a primitive technology so its use cases are quite limited given the superiority of alternatives. Electronic cash in the form of cryptocurrency

Physical cash is a primitive technology so its use cases are quite limited given the superiority of alternatives. Electronic cash in the form of cryptocurrency can make money transfer much cheaper than it otherwise would be. It also doesn't require you to jeopardize your privacy every time you form a financial relationship with a new company, as happens every time you use a credit card with a new company. In fact, your privacy is at risk every time you use an identity linked payment system, given the possibility of hacks/leaks.