Btcs relies on mining operations which generates income. When bitcoin is up, they do well. They have also started back in the GPU mining from what ive heard but I really think their limited... They can mine but they may never cover the cost of operating, is my 2 cents...
I own 150k I bought way back @.12 and feel it probably won't see that again unless major changes happen.
GAHC on the other hand has quite a ride coming.. blockchain tech is just starting and right now, it is all gaining momentum.
I could write pages on the differences between btcs and GAHC but you'll just have to look at how they produce revenue..... You will see it. ;)
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