I heard that we can make much money by mining Bitcoins before, but now we cant anymore. Why?
Now it is more difficult to mine bitcoins then earlier, you need much more time. But price is grew up significantly, so when you mine you get more profit. so i dont think the situation changed dramatically.
Now that bitcoin is very valuable, the difficulty of digging bitcoins is immense, and you need to invest a lot of capital in specialized diggers to get a bitcoin out of this time. Recovering capital is quite difficult if you do not invest a lot at the beginning.