Bitcoin is not inarguably the most successful cryptocurrency. It has completely failed at its stated aim of facilitating payments, and cannot coordinate the necessary technical changes for that to be realistic. It has also failed as a platform for programmable money, since its programming language is almost impossible to work with, and once again, it has been unable to coordinate the necessary changes to implement a working language.

What is “the most successful cryptocurrency”? I don’t know, but I would vote for one of those that set out as a development platform, and have successfully ignited a huge amount of experimentation on novel financial and organizational instruments (although their value may be unfounded).