Yes if you allow everyone to manipulate the Bitcoin price then at the end we will find all the top cryptos value down due to huge amount of price manipulating.
If you want bitcoin to be raise up then we need to look for big investors turns toward the BTC and investment.
Price manipulation happens in both directions, bitcoin has been manipulated to pump many times in history too.
It's rather naive to think of manipulation as the bad guy that is the only reason crypto isn't mooning 24/7. Manipulation is both pumps and dumps that will cause other traders to have to take losses due to unnatural price movement.