ethereum mining difficulty is increasing nowadays
every single month will be 20-40% decrease in profit and this will lower our roi and will make it impossible to get price of our equipment back
bitcoin is the same of it and will never get lower in diffculty,is there any altcoin that can be mined with lower diffculty and getting higher earnning if so which one will be?
Its free money so what do you expect.
No there are no other coins which are more profitable than ETH or ZEC.
It is most definitely not free money. You need to invest tons of money in GPUs and electricity. Plus there are plenty of coins more profitable such as LTC.