Retail level BTC mining days are gone. Years ago.

PROFITABLE?
Yes, if you can:

• Get free or cent lewel electric power
• RUN mining rigs/ farms in cold climate
• Hire cheap labor
• Design and build your own hashing CPU's
• can invest in it 7 digit $$$
• can upgrade your rigs/ farms every 6-9 month

And this list still not ends here.....