It does come up in practice. It's actually a common scam. When only a small fraction of shares are on the market, it's quite easy to manipulate the price highe

It does come up in practice. It's actually a common scam. When only a small fraction of shares are on the market, it's quite easy to manipulate the price higher... buying pressure goes a relatively long way. If you can get 1% of your shares to be worth $100k, it now appears as though you are a $10 million company. This makes you appear reputable. Drive hype about your "valuable" company, and once the stock is sufficiently pumped, dump your shares for profit.