Well, he's only half 'true'
He spotted the trend that mining is not sustainable long term, which is true. He spotted bots hyping the price on some exchanges, which is likely, but cannot be proven. He says to exit to fiat, which is supposedly a safe haven, which is total bull shit.
As you can see, there is a grain of truth in his words, but far from all of what he says.
It is usually like that for what everyone say; Schiff is right on most subjects but he has been wrong on Bitcoin (https://www.youtube.com/user/SchiffReport)
Actually, it's exactly the opposite, Schiff has been dead wrong on most subjects but he's right about bitcoin.