Should Bitshares fees adjust according to the price of BTC?

[luckybit]

Suppose Bitshares is a success but the price of BTC is rising much faster?

Should Bitshares have dynamic transaction fees which go up or down in relation to the price of BTC?

If someone is coming from BTC when the price is going up they might be willing to pay higher fees but if the price of BTC is going down they might be more sensitive to the price of fees.

Market research on spending habits indicate that people who hold BTC spend more of it when the price is going up. This may also indicate they are willing to pay higher fees.