Ask an average miner which they'd rather do:

Purchase a widget that costs 10 BTC and will generate 400 BTC, valued at $2 each or
Purchase a widget that costs 10 BTC and will generate 5 BTC, valued at $200 each

Invariably, the answer will be the second option, even though that person could have increased their BTC holdings by 40x!  Very few people want BTC for BTC sake, they want BTC for what value it provides in their local currency.  Again, you may be different, but you are in a very tiny, miniscule minority.