Everyone has a price. Everyone. Mine is US$10k. If bitcoins hit US$10k each I'll sell all of mine to all comers. Until then I'll hoard and not spend a satoshi.
Thats a high price my friend by anyone's measure. When do you think we will reach that?
10k usd at today's purchasing power?
That's too LOW to cash out imho!
If people 'hoard' coins if really does't matter. Bitcoins are divisible as needed to transfer money for goods and services across the world. Doesn't matter about coins not being used, unless satoshi decides to take a dump one day.