I am concerned why Blackcoin tanked, would the same thing happen to MINT?
BC tanked along with every other altcoin these last weeks. I think the AUR/MZC craze has contributed to the decline of a lot of alts, too. People are selling what they have to make money off of AUR etc at the moment, so a lot of capital is tied up in those alts. People have had their eye on Mint (and Black for that matter) for a while now, so it's in the forefront of the community's consciousness. That's a huge plus. Once people realize the potential in Mint and Black, which probably won't take long, we will see serious increases in price. Just wait for some capital to be freed from the coin-of-the-week.
Also BC don't have merchants that accept it. Mintcoin have ! BC by now is just pump & dump if it don't have use.