It really depends. If you've been mining for years, you'll probably continue to be profitable. If you just started, the challenges will quickly dilute your profits.
Mining equipment is in short supply and increasing regulation may impact profits. Mining requires large amounts of energy and specific hardware. It's not simple and you're only likely to get 0.0004 bitcoin at an average daily rate (approx $16 a day in 2022)
Technically yes but it's challenging. You'll need a computer that can take on complex calculations. You'll need an ASIC machine (application specific integrated circuit) but you're unlikely to mine more than $5700 worth of bitcoin yearly.
You can join a crypto mining pool to save some of the costs and energy demands. However, the profits will be distributed among all of the participants. Make sure the pool is secure and not vulnerable to fraud and hacking.
Sure. Just like you can mine for bitcoin, you can mine for gold, several, and other profitable crypto coins.