Then make the following face when you notice you can't spend all that dust without spending half of it on fees.
but I think when 1
BTC will be worth over $1000 the transaction fees will go for 0,00000x or less.
Am I right ?
If your BTC is made from dust (those miniscule fountain giveaways) then the fee will adjust upwards accordingly. This in unrelated to the exchange rate.
Here's an example of someone trying to consolidate his dust and the issues he's facing with that:
https://bitcointalk.org/index.php?topic=183892.0