I heard that we can make much money by mining Bitcoins before, but now we cant anymore. Why?
To be frankly, it's 2018, the competition and difficulty to find even a 0.001 Bitcoin is hundred or even thousand times harder, compare with 2009. Unless, you have over 6 digit of initial capital or you're open up your own mining farm - else, it's better to buy Bitcoin than mining it by yourself~
That's right, competition among miners are getting strong and bitcoin supply are almost reach to it's maximum.
Mining altcoins could really make more profit that of bitcoin at this time. Though people say sacrifice, but in mining it could really not make any sense because the more you spend on mining-the more expenses you've got.