<prompt> Human: So Im 22 and getting my first paycheck from a professional job. The money isnt great but my only expenses is travel as I live with my folks and they refuse to take money off me.Is it a good idea to invest 10 of my salary into the SP500 every month. Im going to forget about this money and let it grow I know it can fall also. This is for the long term. Im in Ireland btw  <response>: Im going to forget about this money and let it grow I know it can fall also. This is for the long term.Do it within your 401k, and then I think for your age, yea, thats a good idea, within a few years you should be allocating a bit to more conservative things bonds as well, but almost completely SP500 is fine for your age. 