It's not a bad miner , we never say that , but the time to buy it is bad, at this price , do not hope anything for new algo to change profit , Groestl will change their algo , they dont want asic ! and nist as only one coin i mean a good one , so new algo won't change anything.
This is asic world, it's normal: each asic has a short life, 2-4 months of great mining, then earnings drop.
And each asic model, when released, has been already "tested" by developers for some months: THEY did great earnings.
Look at D3: huge earnings during preorder, great earnings when released, after a couple of batches profit dropped. Currently, it could not cover power costs when mining (1200W).
X10 offers 5 algos at low power, much better than GPU rigs.
IMHO, it's a great miner, very versatile, certainly more than other asic miners currently on the market.
If you invest some time reasearching, you can still earn 15-20 USD (or more) in this red days. At 120W-150W-360W.
There are a lot of skein, myr-gr, quark coins out there.
I know some people are trying to rebuild x10 sgminer to make it use nist5 and groestl, supported by current hardware: maybe they fail, but if not, I'm sure we will see immediate release of new x10 firmware by Baikal.
Of course, with 2 new algos available.
Anyway, I think x10 will have a longer life than other asic.