They manage to manipulate because of those people who can't find time to understand their investment, if they just know how the market works then manipulation can't be done easily, bitcoin is another way of investment yet also a currency that can be usable for those who knows how to use it for their
benefits, if all of us who followed and use bitcoin will use it accordingly, then this manipulation will not be tolerated, we can't deny the fact that this is
really happening but soon it will be removed.
Manipulations doesn't have anything with ordinary people and their investments. Economy is like that, if you know laws of economy you know the ways how you can manipulate with any market. You need money and product, with people on right places you move the price in the way you wish by controlling supply and demand. Today we have so many news about everything, they have been used to create panic or fever. Manipulators are not alone, teams and groups of people can do a lot if they have funds.
Look at the young crypto market, take a look on pump and dump groups and what are they doing. Clear examples how manipulations works. That is the same like with any market, just for the bigger markets you need more money, more everything.
Today we are, people of the world, are objects of manipulation, everything is, society and system where we live support that, if you can understand what am I saying, many many people don't.