The shit coins I am worried about are the bizz op coins awarded or paid to you for joining a business and participating in the company activities. Such as, recruiting, staking ( With real money ).
We all know the type of thing, Join XYZ for FREE and earn OUR CRYPTO COIN, that cannot be used or sold anywhere else! Most run as a Ponzi to start with when lots of people join then as it slows down they start bringing in conditions for earning, withdrawing coin, cashing out! They usually want more of your money to qualify, they will move the goalpost repeatedly so you never reach a ROI,
Take care out there!