a lot of people think as $10,000 as the magical target price, at which point they will apparently dump their coins and live happily ever after...
That's this year's version.
It wasn't all that long ago that those who paid pennies per coin thought that $100 per bitcoin was the moon. Many cashed out when it finally got there.
By last year those who'd paid a few dollars thought the moon was $1000 and sure enough, when it hit a grand many dumped.
Now we have many noobs who think of bitcoins as costing hundreds of dollars each, so we shouldn't be surprised that they see the moon at $10k and we can expect a accompanying dump when that's reached.
When Bitcoin broke $100 it made a millionaire out of whomever sold that famous pizza. Last autumn when it broke $1000, all the thousand coin holders became millionaires and a big party was planned. It's little wonder that those with a hundred or more coins are eagerly awaiting $10k per.
And on and on it goes, at least until wide-scale adoption takes hold.
As for dumping any coins to live happily ever after, that would be foolish. Ever after would almost surely be happier with billions of satoshis than with millions of dollars, euros or whatever fiat currency is still standing.