I'm used to talk about altcoin as an ecosystem. This is part of what I wrote to rat4 earlier:
When you talk about blackhole, I see a parallel with predation. Is blackcoin a predator (remember, predation is just a brutal way to get energy, by stealing energy from other life forms instead of getting from the sun or from eating plants)? I believe it already is.

We ma draw a partial parallel with life's trophic level
On the first trophic level (plants and algae in carbon life) are PoW coin (PoW = photosynthesis;value given by people = sun)
On the second trophic level, we have multipool (whichever coin they are feeding)
Blackcoin was on the first trophic level during its PoW stage. Then for a while, it stayed that way without any way to "eat" (no more PoW/photosynthesis, only expectation people would buy it). It would have cause its death (like what may be happening to poor mintcoin) if it wasn't for the multipool.

Now, if the multipool becomes a huge success (if what happend this week end continue), they blackcoin could become an apex predator, feeding on everything. Zoology taught us that apex predators are dangerous for everyone (obviously) including themselves! They become so well adapted to their ecosystem (read: invincible) that they start to exhaust it - they run out of food.

So my point is: if the multipool succeeds, blackcoin may become an apex predator and exhaust its supply (or its supply may adapt to become invulnerable, like poisonous animals did) and die. Granted, we have time until this happens. But this is very possible.

Enough for the zoology lesson. For now, keep you blackcoin and enjoy the ride. We should have at least two months before coins adapt (if the multipool developper keep their promise of making bc multipool better than other multipools).