[simonebrunozzi]

How to get to the 99.98% figure:

9+7=16 hours of downtime since the network started to operate (Jan 3rd, 2009).

4,753 days since then, or 114,072 hours.

Uptime: (114,056 / 114,072 * 100) = 99.98% since inception.

[dane-pgp]

For 16 hours to be 0.01% of the total time, bitcoin will have to be 160000 hours old, which is about 6666 days, or 1913 days from today. So on April 5th, 2027 (assuming it has no more downtime before then), bitcoin will be able to claim four-9s of reliability.