Unfortunately all markets, even regulated financial ones, are subject to market manipulation. In regulated, this is legally forbidden and if the authority finds out, investigations are open and law is enforced, so it is difficult. Yet, you sometimes find news about that, such as the big manipulation in LIBOR that happened some years ago.

Crypto markets are mostly unregulated, in many countries. This makes much easier for the big capital to manipulate, unfortunately.

This is why you need to be smart.