  Cryptocurrency has attracted significant attention. Considering the number of
individuals investing in bitcoin, their motivations are comparatively less
clear than traditional investment decisions. As of December 2020, the market
has continuously increased in cryptocurrency. Especially, the spike of joke
Dogecoin shows the weirdness of the modern meme economy with the support of
Elon Musk, whom himself appointed as "Dogefather". In this paper, we analysis
the impact of tweets by Elon musk and present some statistical analyze with
event study.
