That's one of the stupidest and noobish explanations ("I don't understand what's going on, my favorite asset doesn't do what I hoped for - must be lizards or witches!").
"Everything" is "manipulation", also when you yourself buy or sell.
Large investors are allowed to do the same, only their impact on the market is way stronger.
If you have prove of hostile market manipulation, post it, otherwise, just stop repeating this nonsense.