It this was dot com bubble into the housing crash, the spike would be that high every day and that's before adjusting for inflation. Around October 2008, the federal reserve switched to outright quantitative easing, which is better viewed here, and the amount dwarves this.
https://fred.stlouisfed.org/series/WALCL
$6.5 trillion and trending down vs about $30 billion spike in repurchase agreements. I don't think this is significant.
