No. I strongly disagree with that argument or statement. Because as far as we can observe, there are still a large count of population in the world who does not recognize and do not know bitcoin yet and do still prefer using fiat rather cryptocurrencies. Not all people can easily handle and use bitcoin effectively so many are not still dependable into cryptocurrencies because fiat is still the most valuable thing for them. As for now, bitcoin has already reached the $8,000 mark but still fiat is worthy and that will be still worthy even bitcoin price pumps up to $10,000 because people still depend and rely their everyday living on it.