i don't care about the price,i will mine some coins and hold in wallet,
but it is really very hard to dig.

What Algo are you mining? It seems the difficulty with this coin is finding a good pool.
Zpool and the dev pool are finding lots of scrypt blocks now, minep.it is going well with SHA-256 and for groestl the most blocks are being found at p2poolcoin.
You have to remember as well that individually the algorithms have 7.5 minute block times, so there are fast transaction times but makes the coin harder to get
Hope that helped
