Miners collect transaction fees. It's still profitable to mine and will remain so or Bitcoin is dead. You need to compete on tech and electricity prices though. Other coins are still profitable to mine on a CPU and at higher KWh prices, since where KWh is really cheap, ASICS will be mining Bitcoin. In the future I'd expect Bitcoin to have a normalizing effect on $/KWh and therefore tech will be deciding. If you want to mine on a home CPU, you can mine e.g. Monero and still be profitable.
That's what I was implying when I said they only handle transactions now. I guess if I have to explain that all the Bitcoin has been mined I'd have to specify miners don't handle transactions for free.
All Bitcoin hasn't been mined.
Go try to mine some.
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