Based on the industrial revolution 4.0, all equipment is already using digital system. Want to travel? Use Expedia, or Skyscanner. Want to go somewhere? Use Uber. Hotel? Trivago. Now people are more comfortable buying goods online than walking and waste their time. So is bitcoin, people know more about cryptocurrencies. But I don't know if fiat can replace cryptocurrencies. At least bitcoin has been processing. There are no transactions as safe and as fast as blockchain. Blockchain is the latest technology at the moment.