Pulled up by the Bitfinex price being included - but the purported "price" in Bitfinex isn't realisable, because you can't get any hard currency (not just USD)

Pulled up by the Bitfinex price being included - but the purported "price" in Bitfinex isn't realisable, because you can't get any hard currency (not just USD) out of Bitfinex! Remember that the recent flash crash on GDAX ($1184 -> 6 cents) was courtesy just 100BTC of trades. I question the degree to which Bitcoin can be said to have a realisable "price".