I want the cash now dam it

[arod15]

Question,
Right now im at a point in time where I can leave my job for a 20K bump up. The catch is long term (like 12 years from now ill be 35ish) If i stayed my yearly income would be appox 300K. Where at the other places, regardless of where i went i would be around 150 -200max. So the question is should I wait out these years, or is a dollar today worth more than a dollar in the future since I can invest it and make it grow? Dam its 20K not pennies am I being to short sighted?