I saw a Ferrari parked on the side of a busy street. And then another Ferrari not far away. And then a Porsche (okay, it was "only" a Carrera) on another street in a few minutes.
Only in Hong Kong do you have people who are rich enough to shell out dough for fancy cars and too cheap to pay for fancy parking. I mean, seriously, aren't you a bit worried that your nice little race car would be scratched in an accident? Can you pay for valet parking (and I do apologize if those parked cars ARE a result of valet parking - if I were the driver, I'd be furious now)? Too much? Park underground and you can annoyingly take up two spots so no other car will even try to squeeze in. I have hundreds of solutions that won't cost you more than HKD200. All to insure damage against the 1M+ cars.
Why so cheap?
Cynical as I am, I believe it's because these guys (or gals) bought the race car because of the price tag. The car is to say I can afford a car, not that I have taste in cars. In this small city of 6 million, I guess people are desperate to stand out from the crowd. Guess what, you succeed: you stand out as a moron putting your lovely car in harms way.