Look at the orderbook on bittrex:

A person has to ask why, with such an absurd depth/spread, those buyers don't actually buy the coin high enough to even the spread and "get rich".
The likely answer is that they are only trying to get others to buy the coin high enough to let them dump the massive premine.
Duh
lol never had much BTC have you?

You put up a wall like that, not just for price support but also for accumulation. You give big holders an opportunity to sell into your wall whenever they want out without crashing the price while not having to buy a coin at inflated prices.
Even I have done this on lower market cap coins with great success, and I'm no whale.
Oh, you have much bitcoin, or you had much bitcoin?
Me being a little guy, thought a 50 btc - 70 btc buywall quite massive.
At a hefty premium to launch price, ~ 3x bring up dev price,
and considering the only possible sellers were airdroppers with 282 decred each,
Of which we know only ~ 33% have even been moved.
To me, that only gonna push up the price, the hope, and the hype.
But you the big trader