from january 2018, bitcoin price is always changing, a suddenly increased but after a second deep dropped will surly exist. it is the vise versa of bitcoin price last year (2017). until now the price of bitcoin from january upto now (june) is still dropping. so i was wondering if theres a group of people behind this bitcoin price drop?
You haven't here before, aren't you? Bitcoin is prone of manipulation and any other crypto-currencies, even the fiat currency is prone too of manipulation. No matter what we(people), made there will be someone that will make an advantage of it for their own benefits. It sucks btw, but we couldn't do anything about it, that's why we gotta have to ride it all along.
yes, bitcoin price movements can easily be manipulated by people who have large capital to influence market price movements, it can certainly be exploited for personal gain so they can easily make a profit by manipulating market price movements.