  In a previous paper, it was discussed whether Bitcoin and/or its blockchain
could be considered a complex system and, if so, whether a chaotic one, a
positive response raising concerns about the likelihood of Bitcoin/blockchain
entering a chaotic regime, with catastrophic consequences for financial systems
based on it. This paper intends to simplify and extend that analysis to other
PoW, PoS, and hybrid protocol-based cryptocurrencies. As before, this study was
carried out with the help of Information Theory of Complex Systems, in general,
and Crutchfield's Statistical Complexity measure, in particular. This paper is
a work-in-progress. We intend to uncover some other measures that capture the
qualitative notion of complexity of systems that can be applied to these
cryptocurrencies to compare with the results here obtained.
