It is still worth it to invest in ASIC miners and mine Bitcoin but it is not for all people, if you don't have enough money to invest in ASIC miners, it is too late for you. It is only worth it if you have money to buy multiple mining hardware and have extra money to pay huge consumption in electricity and also for maintenance. But what's good is that Bitcoin is not the only cryptocurrency you can mine, you can also mine alternative coins using GPU which have less power consumption compared to ASIC, I suggest that you use mining calculator before deciding which coin to mine so that you have an idea if it is profitable to mine a coin with your capital.