You are wrong for saying there is no least manipulation on Bitcoin. Bitcoin is not like other cryptocurrency that gets manipulated easily and this is why Bitcoin is the most dependable cryptocurrency. Bitcoin also gets manipulated but there is a difference. Manipulating Bitcoin has to be expensive therefore not every whale will want to do that but there are some that tries and do not succeed. I saw a news that an address that mined Bitcoin during the days of Satoshi still being active just move some Bitcoin from the address for the first time, what this news means is the whale is thinking of selling his Bitcoin and this can create panic among other retail investors and they begin to sell causing the price of Bitcoin to fall, this is manipulation because they have cause a reaction that is making people to want to sell.