BTC mining is dead, sorry.
If BTC mining would be dead so would be the coin.
No mining > no blocks > no transactions > no way to use your coins. DEAD!
Which is obviously not the case!
Mining is still profitable always if your electricity cost $0.05Kwh. Not only for bitcoin but every new coins that requires mining is very profitable.
Depends on the gear you have, s17/s19, yeah it's profitable, s15 you barely earn a few cents, anything below that you lose money.
There are a few people there always sharing their rigs and setup and YES if you set up traditionally you'll be paying a lot for ASICs but if you somehow have a way for clean and cheap energy (like home solar setups that virtually cost nothing except setup) then even cheaper older ASICs are available.
Virtually nothing? Lol.
Do you think that you can put a solar panel on your house and you will be able to feed a 3000W miner all day?
You will need at best 10 panels just for that, not even mentioning batteries, controller , inverter.
All that for earning 8-9$ a day, after you pay 2000$ for a miner!