Hi Ifemini, Cryptocurrencies such as Bitcoin do have scalability issues however there is technology being developed that will drastically help with that. Currently, if you use a Visa card for purchases or paying bills, it can handle 24,000 transactions per second, meanwhile in comparison Bitcoin can only handle 7. However you may have heard the term 'Lightning Network' in reference to Bitcoin. This adds another layer to Bitcoin’s blockchain and enables users to create payment channels between any two parties on that extra layer. These channels can exist for as long as required, and because they’re set up between two people, transactions will be almost instant and the fees will be extremely low or even non-existent. So yes, one day, hopefully soon, the use of crypto to pay bills, etc will be used more and more, and traditional fiat money less.