Bitcoin was activated January 2009. The last time it was $1000 on Bitstamp was March 27 of this year. Eight years and three months.

I don't consider ATHs because they are far too unstable. Willy's Mt Gox manipulation gave us our first $1000 ATH, which lasted for what, all of 10 days?  It took until March 27 of this year for $1000 to finally establish a floor.

I'm not interested in transient doublings but "permanent" ones. I say "permanent" because I'm assuming (hoping, praying) it will never drop down to $1000 again.

I suppose for traders, ATH doublings might hold some significance. But for long time HODLers, it's the "permanent" doublings that really matter.