Cryptocurrencies do not exist as a stack of notes or coins. Instead, they live only on the internet. Consider them virtual tokens, the value of which is decided by market forces created by those seeking to purchase or sell them.
While paying for things in cryptocurrencies doesn’t make sense for most people right now, more retailers accepting payments might change that landscape in the future. It’ll likely be much longer before it’ll be a smart financial decision to spend Bitcoin on goods or services, but further institutional adoption could bring about more use-cases for everyday users, and in turn, have an impact on crypto prices. Nothing is guaranteed, but if you buy cryptocurrency as a long-term store of value, the more “real world” uses it has, the more likely demand and value will increase.

Further to the above, better results were found [24] compared to SADF when using a backward expanding window, which they introduced as backward SADF (BSADF). This performs the same supremum ADF test, but this time with a fixed ending point, r2, and backwards expanding window:
Ricardo Salinas Pliego, a magnate with large operations in retail, banking and television who has been seen as President Andrés Manuel López Obrador’s closest business ally, wrote in his social media accounts Sunday that Bitcoin is a good investment.