No such thing - there is always a bigger fool - so today's most expensive speaker on earth will be surpassed.
FWIW - room acoustics quickly become the most limiting factor for sound quality. You can't put lipstick on a pig (the most expensive speaker on earth is never going to make a bad room sound wonderful)
FWIW - room acoustics quickly become the most limiting factor for sound quality. You can't put lipstick on a pig (the most expensive speaker on earth is never going to make a bad room sound wonderful)