Okay, so at the risk of sounding totally dumb, I have a question. I've invested about 10k into Betterment, before the whole downturn. Now I'm at a loss and my value is under 10k. I find myself asking, what happens if the value gets to 0? But these are funds, and the funds will have some value even if they are really low right? Or will I be washed out if the losses are high enough? My brain is struggling a bit to wrap my head around this concept.