I am surprised that more people in countries like Ukraine and Argentina that have currency issues don't use bitcoin. However, bitcoin has dropped far further against the USD this year than those currencies have. (Sad to say as I am a bitcoin believer.) I think a bigger part of the issue is that there isn't the infrastructure to easily convert your bank holdings into bitcoin in these (or almost any) country.
yes it dropped against usd because it was already sky high....obviously there was a huge bubble that popped but now we have a new baseline, let's see what happens from here, also realize bitcoin has built in inflation which decreases over time.