Let's help the new buyers choosing in what to buy. Here're mine two which are down like 900%:
1. ITC: $9.15 ATH in January and currently $0.92.
2. SelfKey: $0.08 ATH in January and currently $0.01.
That's unlucky. I have a lot like PRL, DGRN, HPB, HAT, etc... Like almost my entire portfolio, but I'm hoping for a recovering in few months.
Did you meant 90% down

It's can't be > 100%. 0 value would mean 100%.
Well by 900% down, I meant 100% down makes the value half, 200% makes it further half and etc. However, now I've corrected it to 90% down on ROI (return-on-investment), so that should clarify things more.
