The opposite also applies: You couldn't buy up a large proportion of Bitcoins without the price skyrocketing. Prices are determined at the margin, what the marg

The opposite also applies: You couldn't buy up a large proportion of Bitcoins without the price skyrocketing. Prices are determined at the margin, what the marginal seller (probably miners) will sell for and what the marginal buyer will buy for. They are the best measure of "fair value".