In fact the DEVs are buying, but someone is pouring, no one knows who it is.

LOL, of course they are.
What is your proof of that?
They told you?
LOL.

you can check dev address here : https://etherscan.io/token/0xeb7c20027172e5d143fb030d50f91cece2d1485d#balances

Last time i saw was around 2,5M , devs have bought a lot.

Someone is playing behind , not devs

The rank 1 address belongs to the ED, not devs.