It is not as high as you would think. The top average quant salary is $400k but if you follow this Quora link, it is not as high you would think for London UK. It is also 4 years old. I posted some jobs paying up to a million plus.
Get your portfolio evaluated https://quantlabs.net/portfolio
https://www.quora.com/What-is-the-average-quant-salary-with-and-without-a-PhD-with-the-same-number-of-years-of-experience