Burst offers much more real world usecases than most people think of today.
Thinking BURST is cheap to mine is an illusion since BTC was also cheap to mine at some point in history.

One of the main advantages I see is that there are almost no running costs to keep the network secure.
This in combination with the offered features that have been developed on top of NXT makes BURST technically suitable for many all day usecases.

In terms of exchange rates I do not want to set a price but if you think of a service like slack offers and for which would be payed with BURST in a decentralized environment you can easily create a demand for the coin. If you say the price is set to what a miner with 2tb capacity can mine in a month and compare it to the smallest payed slack account these 10k burst have a value around 6.5$. Running a dedicated 2tb drive 24/7 for mining gets you your investment back within a year while having the next years for free.

If you play with these numbers it means to me that the mid term low settles somewhere where it has been a year ago.
For me the history has shown that everything takes a moment longer compared to other coins but finally it happens.