Is it the largest one? If you follow Bitcoin for long, there was already a mania in 2013 (red rectangle). Let's zoom on it.
The factor is around x4600 on 3 years.
Oh, but there is more (another red rectangle zoomed):
Factor is around x2000 on 3 years for the early 2013 bubble. And again:
Factor for the 2011 peak is infinite since the initial value in USD was 0 (and there was no Bitcoin in activity in 2008).
Interactive chart from XE.com is visible here.
To summarize, the hit-parade of bubbles would be rather:
- Bitcoin 2011
- Bitcoin end 2013
- Bitcoin early 2013
- Bitcoin 2017 (ongoing...)
- Tulip-mania 1637