Simply put, via blockchain does not need time when making transactions. Because, in a transaction there is usually a third party that bridges the process. For example bank or Paypal. What's more, blockchain is the technology behind Bitcoin. "All this time transactions carried out by both parties require intermediaries from third parties who act as trusted parties, such as banks. With Blockchain technology, transactions can be carried out directly between the two parties without intermediaries which can be a point of failure. That's just one blockchain application in the financial industry and in the future it will be broader for various industries such as health, supply chain management, oil and gas, government, and more.