It is hard to manipulate the market but I think it is possible. I guess it is when the big investors group together , this will be the only time I will believe that market is manipulated .
People who do certain manipulation of those who have a very large amount of funds and usually it is done by a group that is already professional. Manipulation will always occur and the fact that it is very detrimental to many people. The manipulators only try to benefit themselves and they don't think about the fate of others in dealing with conditions like this. Manipulation will cause a lot of panic and that is a bad start for cryptocurrency development.