According to everything I have been able to read and see over the years, it is almost impossible for another currency to replace BTC, the reason is unique, BTC is the King, it is the only currency that has a life of its own and that has a history, any other currency has to meet the normal requirements in the speculative markets, such as going through accumulation and distribution stages, for me a currency other than BTC cannot be compared because BTC is unique and has the deflationary economy that makes it unique.