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@Opiart: Below is a sampling of Weiss Cryptocurrency Ratings, selected randomly to illustrate a variety of strengths and weaknesses:

Bitcoin (rated C+) gets excellent scores for security and widespread adoption. But it is encountering major network bottlenecks, causing delays and high transactions costs. Despite intense ongoing efforts that are achieving some initial success, Bitcoin has no immediate mechanism for promptly upgrading its software code.
Ethereum (B), the second most widely adopted