Here is a list of all the best CPUs to mine Monero on.
Mining bitcoin with your CPUs and GPUs is still possible, although often it means mining another coin such as ethereum or Monero in this case and then converting that into bitcoin.
This is a list of the top 20 CPUs that you can mine Monero on, most of them are server CPUs and some of these are available fairly cheap.
DUAL AMD EPYC 7601 - 3500h/s
INTEL XEON PHI 7210 - 2770h/s
2X INTEL XEON CPU E5-2699 V4 @ 2.20GHZ - 1910h/s
2X INTEL XEON CPU E5-2699 V4 @ 2.20GHZ - 1910h/s
4X AMD OPTERON 6282 SE - 1801h/s
2 X 22-CORE INTEL E5-2699V4 2.1GHZ - 1590h/s
XEON E5-2686 V3 (DUAL) - 1560h/s
2X INTEL XEON E5 2699V3@2.3GHZ - 1540h/s
2 X INTEL XEON CPU E5-2699 V4 @ 2.20GHZ - 1500h/s
2 X INTEL XEON E5-2699V3 - 1500h/s
INTEL XEON CPU E7-8880 V3 @ 2.30GHZ - 1500h/s
1X E7-8890 V4 - 1483h/s
2X E5-2697V3 - 1450h/s
AMD RYZEN THREADRIPPER 1950X - 1280h/s
I9 7980 XE - 1214h/s
4*(16 CORE) INTEL XEON E5-2686 V4 - 1210h/s
2 X E5-2680 V3 @ 2.50GHZ - 1192h/s
XEON E5-2686 V3 (DUAL) - 1175h/s
INTEL XEON E5-2240 V2 @2.64 GHZ - 1168h/s
2 X INTEL(R) XEON(R) CPU E5-2658 V3 @ 2.20GHZ - 1160h/s
