....do anyone know why during the last days there are only pumps and dumps and then linear/orizontal trades?
What you are looking at has been called a Bart formation.
Basically if you ever watched the Simpsons and you notice how the son, Bart looks its similiar to this pattern.
The reason why this is happening more and more lately is due to poor liquidity and low volumes. Basically anyone with around 1000 BTC can easily make the market move up and down like that.
There are rumors that some whales do this on markets like Bitfinex so they can make large amounts of leveraged bets on the futures like OkEX and Bitmex.
ok so this kind of bart fluctuations can stand for a long period of time, because there are a lot of players with that btc amount and a lot of newbies entering/reentering or quitting and then entering again in crypto exchanges...
I believe that the true value of btc will help the market rise, if not, we are all rekt...