That is terrible advice.
If you work at a startup then compensation will be a mixture of salary and equity. You should know your worth and negotiate your number when joining a startup. You should understand the details of the last financing: how much was raised? who were the investors? how long is the runway? what were the high-level economic terms of the deal?
You should ask around to see what is fair market terms for the options you should receive. You should do a search on angel.co/jobs and look at comparables.
Read Venture Deals by Brad Feld and Jason Mendelson even if you are not a founder. Founders and investors know this stuff. If you are naive going into your employment you may end up being screwed out of upside.
Get your papers straight.