  In this study, we investigate the BTC price time-series (17 August 2010-27
June 2021) and show that the 2017 pricing episode is not unique. We describe at
least ten new events, which occurred since 2010-2011 and span more than five
orders of price magnitudes ($US 1-$US 60k). We find that those events have a
similar duration of approx. 50-100 days. Although we are not able to predict
times of a price peak, we however succeed to approximate the BTC price
evolution using a function that is similar to a Fibonacci sequence. Finally, we
complete a comparison with other types of financial instruments (equities,
currencies, gold) which suggests that BTC may be classified as an illiquid
asset.
