You're missing the point. Some here think that by buying 1BTC, they are buying 1/21millionth of the technology. I'm simply pointing out that's nonsense.
Actually you are buying 1/21 millionth of the total digital units of the most sophisticated, actively developed, global, decentralized, secure transactions network the world has ever seen...
That's why buying 1/21 millionth of an altcoin costs 1000 times less despite the fact that the underlying technology is almost identical...