What if this bear market is like the Dot Com’s crash one? 929 days to the reach the trough!!

Doing some research about the Dot Com crash i found out that it took 929 days to reach the bottom of the market from the peak in March 24th 2000 to the trough in October 9th 2002. Do you guys think that we are now in a similar situation, or even worse? What would be the best strategy under this scenario? Just DCA periodically into index funds or is lump sum preferred assuming we have nearly 2 more years of pain?

Historical Data of Bull and Bear markets:

https://www.yardeni.com/pub/sp500corrbeartables.pdf

Thanks