That 1700 BTC wall on stamp looks totally phony..i wonder how many actual buys it is going to be to reach 1000$, at the price of 980$ why would suddenly there be a huge sell-off when the trend is obviously gonna be way higher than a mere 1k$?
Some walls are put up to stall the price to give time for fiat deposits to show up, some walls are put up to gobble any coins front running to get more coins in a certain range, some walls are put up by buyers who want the effect of crossing $1000 to be bigger. It's either something like that or they are crazy.