You would be technically right, but you are forgetting one detail: What does price represent?
The price represents the trust on a project.
If bitcoins prices were driven all the way to zero, means that people's confidence on Bitcoin is being eroded.
On the othe hand MaidSafe's project is completely independent from bitcoins and blockchains in general, and the prices you see reflected in BTC in the exchanges it is what investors are considering to be the fair market value. If the trust on MaidSafe's project is not violated, regardless of the price of BTC in USD, the price of MAID will adapt itself to keep the same value that people believe it is worth.
To make it clear, let's make an example:
1) Let's say that BTC prices suddenly fall 50% in USD.
2) It doesn't justify a 50% decrease of MAID's value (there is nothing wrong with MAID itself), therefore it is expected to MAID prices to proportionally increase in 50% it's value in BTC.
It may not exactly be the same ratio, but it will be pretty close to it.
The good thing is that if you invested on an undervalued project (such as MAID), you will keep increasing your BTC holdings (when prices gets actualized) AND get hedged at the same time on BTC's fluctuations.
That was my hypothesis when I started this journey, and so far I've been right.
So in the unlikely event of BTC prices going to absolute zero, as long as the fundamentals of MAID remain strong, it's value will still hold maybe directly in USD or under some other dominant cryptocurrency as a new standard pairing.