Nobody invests, specifically in these coins. Everyone speculates, even in bonds :)
Bitcoin certainly is more speculative than GE stock, but look at GE's stock performance and dividend performance. Anyone who thought they were investing into the long term value of a major American company was actually speculating as to whether or not a blue chip stock could produce cash flow and maintain the value of real assets, which, they couldn't do so as well as they did 20 years ago.