styrofoam peanuts as THE potting medium?

[Wrebbitrocks]

i just repotted a few orchids but since im out of bark for now, i potted them in some peanuts i had in a box somewhere. i did my research and saw that only white should be used as other colours have certain chemicals related to their function. anyways, its only temporary while i get bark, but i was thinking if it could be permanent. so far, styrofoam is lightweight, lots of air, dries out by the end of the day (ive been watering them every other day to keep up), it looks very clean and its easy to lodge so the orchid stays stable. also, theyre sending out new roots after they got into it so it cant be that bad. i wanted to ask if there would be any problems long-term such as leaking degrading plastic chemicals, breaking down, etc. for now theyre staying until i can afford bark. any insight?