Transactions made through a central authority may take a few days to complete. For example, if you try to cash a check on Friday night; You may not see the money in your account until Monday morning. Financial institutions which operate five days a week during business hours.; Blockchain operates 24 hours a day, seven days a week, 365 days a year. Transactions are completed in as little as ten minutes and are considered safe after just a few hours. This system is particularly useful for cross-border transactions that usually take longer due to time zone issues (and all parties need to confirm payment transactions).