Even better!
You can buy more hashing power, mine more bitcoins!
Here is some historical(?) price of GH with CEX.IO that I compiled.
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Date GHS/BTC USD/GHS
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2014-01-17 19:20 0.04571
2014-01-18 17:50 0.04610 $39.70
2014-01-20 00:59 0.04619 $29.51
2014-01-21 00:02 0.04622 $39.52
2014-01-21 20:51 0.04396 $41.43
2014-01-23 02:05 0.04388 $29.11
2014-01-23 22:37 0.04375 $41.31
2014-01-25 21:30 0.04340 $17.46
2014-01-26 18:38 0.04000 $37.10
2014-01-28 22:06 0.03847 $30.28
2014-01-29 23:48 0.03545 $26.34
2014-01-30 23:48 0.03388 $27.10
2014-02-01 00:09 0.03485 $28.04
2014-02-01 19:56 0.03504 $34.78
2014-02-03 01:05 0.03401 $22.63
2014-02-03 20:16 0.03342 $33.79
2014-02-04 21:04 0.02944 $22.93
2014-02-05 21:54 0.02592 $19.96
2014-02-06 22:30 0.02899 $21.72
2014-02-07 23:00 0.02957 $20.71
2014-02-08 21:56 0.02843 $21.24
2014-02-09 21:35 0.02376 $17.45
2014-02-10 21:38 0.02389 $16.35
2014-02-11 21:38 0.02354 $16.14
2014-02-12 21:46 0.02358 $15.54
2014-02-13 21:46 0.02470 $15.62
2014-02-14 22:13 0.02478 $15.85
2014-02-15 22:02 0.02431 $16.11
2014-02-17 01:51 0.02322 $12.81
2014-02-18 00:03 0.02359 $16.06
2014-02-19 01:25 0.02440 $14.48
2014-02-20 01:19 0.02468 $14.44
2014-02-21 02:00 0.02544 $14.24
2014-02-22 02:01 0.02523 $15.04
2014-02-23 01:33 0.02402 $15.05
2014-02-23 23:19 0.02447 $14.67
2014-02-25 04:42 0.02377 $10.56
2014-02-26 01:50 0.02410 $16.13
2014-02-27 01:31 0.02399 $14.25
2014-02-28 01:36 0.02357 $13.35
2014-03-01 01:45 0.02353 $13.36
2014-03-02 01:17 0.02354 $13.76
2014-03-03 00:45 0.02272 $13.81
2014-03-04 01:32 0.01988 $13.33
2014-03-05 01:32 0.02020 $13.32
2014-03-06 01:20 0.02054 $13.89
2014-03-07 01:25 0.02044 $13.22
2014-03-08 01:39 0.02010 $12.52
2014-03-09 01:56 0.01998 $12.34
2014-03-10 00:13 0.01947 $13.55
2014-03-10 22:27 0.01720 $11.70
2014-03-12 02:15 0.01602 $8.87
2014-03-13 02:50 0.01564 $9.88
2014-03-14 02:46 0.01140 $7.30
2014-03-15 02:56 0.01248 $7.87
2014-03-16 04:04 0.01266 $7.68
2014-03-20 02:56 0.01244 $7.36
2014-03-21 02:46 0.01178 $7.15
2014-03-22 02:17 0.01179 $6.84
2014-03-23 02:26 0.01186 $6.71
2014-03-24 00:28 0.01129 $6.84
2014-03-25 00:33 0.01105 $6.41
2014-03-26 02:18 0.01082 $5.80
2014-03-27 02:12 0.01044 $5.87