Bear markets should be measured from the first crash after ATH to the moment of breakout from the bottom. You marked November 2013 which was in a bull market right before ATH in December.
We had longer bear markets but it doesn't mean anything. Every situation is different and you can't predict the future bear markets by watching the previous ones. Especially when there weren't many of them.
the 2013 ATH was not a sustainable rise. its was just price drama. the cause ASIC's changing cost of mining. which then OVER escalated into speculation
the 2017 ATH was not a sustainable rise. its was just price drama. the cause VC btc purchase to then hand btc to certain investment contractual obligations. which then OVER escalated into speculation
the bitcoiners as a whole were not all active and online and able to actually be part of those events as they were temporary.
EG a volcano in hawaii looks emotional to watch but the main population were not actually on the island to experieince and feel it.
so dont worry/concentrate/care about ATH
however every day everyone gets to handle and be part of and experience and feel the benefits of the prices above the baseline/low tide/ground level.
so again dont measure history based on ATH but based on the differences of the ATL... it will switch your mindset to a positive mindset of glass half empty and still room to grow. instead of glass half full and not much left to go.