Bitcoin is making headlines in mainstream media on a daily basis, and deservedly so. It's the grandaddy of all cryptocurrency and, with few exceptions, tends to dictate the profitability of all other alt coins beneath it. On a value-per-coin level, it's worth far more than any other digital currency in existence -- and there are more than 1000 of them. Stuff like Litecoin, Dogecoin, Electroneum, Ravencoin, Ethereum, and GRAFT.
If you are on a private network (and if you just want to test the technology for free, you should) then any normal computer with a normal CPU will be able to run the network and earn test ether (ether that is only redeemable on the test network where it was generated) through mining. This is the best choice for small-scale network or testing privately, as it's less resource intensive. On the real (or live test) network a normal desktop (or laptop) computer might take a very long time to successfully mine a block and receive ether.
It is possible that the Ethereum Platform will not be used by a large number of external businesses, individuals, and other organizations and that there will be limited public interest in the creation and development of distributed applications. Such a lack of interest could impact the development of the Ethereum Platform and potential uses of ETH. It cannot predict the success of its own development efforts or the efforts of other third parties.