[gestirn]

What is too high and what is too low in Bitcoin world and how do people come up with those values?

If people were keeping track of Satoshis (0.00014 USD/Satoshi) would they also think it is expensive?

[koonsolo]

The only way to tell is look at the market capitalization (see https://coinmarketcap.com/)

To compare, if Bitcoin reaches $400.000 per bitcoin, the total value of all Bicoins will be the same as the total value of all gold.