We’re certainly in a much different place now than we were 12 months ago. What was a hot commodity has turned into a hot potato nobody wants to touch. Still, this almost certainly won’t be the end for bitcoin, or cryptocurrencies as a whole. Despite the realization that it was a bubble, even the toughest critics see some sort of a future.
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In order to provide a methodology to detect bubbles in time series, Phillips, Wu, and Yu [23] proposed the supremum augmented Dickey-Fuller (SADF) test. This applies a series of right-tailed unit root tests to expanding windows of a time series (with a fixed start date), defined by where r2 is the final data point to be considered in each window, starting at r0 which is a fraction representing the smallest allowed window size and expanding to 1(the complete data set).
This question does not have a plain vanilla answer in ‘yes’ or ‘no’, as the government and the central bank still look unsure as to how to deal with this new-age phenomenon. In 2018, The Reserve Bank of India (RBI) came out strongly and kind of banned these tokens in India. Then in 2020, the Supreme Court of India reversed the RBI ban. That move was welcomed by the crypto exchanges and investors throughout the country. After this, Indian banks have tried to curtail transactions with crypto-exchanges as, in their view, they are governed by RBI. But later, RBI mentioned that banks cannot quote its 2018 ban to customers as it was overruled by the Supreme Court, paving the way for crypto trading to continue in India.