Well he did not say directly that it was Bitcoin to be obsolete but still as a part of blockchain process then may be Bitcoin will be obsolete too. There is no permanent of this world except change so i believed blockchain will not gone but it might be replace to improve more because the technology is already adapting the block chain, nations are adapting it and also the banking system that they are also very confident with it and that is why they want to adapt it too. So change is possible but obsolete is not.