Bitcoin 100.00% Uptime form 2014.
Bitcoin down time was 2 TIMEs (CVE-2010-5139 https://www.cvedetails.com/cve/CVE-2010-5139/ and CVE-2013-322 https://www.cvedetails.com/cve/CVE-2013-3220/ )
In 2013 and the chain forked into two. down time was about for 6 hours and 20 minutes.
This is the payment system we all need, very minimal interruptions and uptime of 99,988. Just imagine, until now my bank has experienced a lot of disturbances, especially during peak hours, the mobile banking system cannot be accessed making it difficult for customers to send or withdraw their money. Just imagine for example banking has a system like that of Bitcoin, how good is that