I also feel this is a joke, it is impossible for cardano to replace Bitcoin even though Cardano launched PoS, on the market there are many altcoins who are ready to make updates and innovations to attract investor interest, cardano must be able to pass market competition before intending to replace Bitcoin
It was a joke, I can't imagine it happening, because cardano is still very far away. from the market and community supporters I think should prepare longer cardano to realize those ideas.