Correction is normal in a healthy market, not all the time it will surge up there will be still some who take a profit causing a drop. Regarding manipulation, it is really hard to tell if the market is getting manipulated perhaps I will only say that the market was manipulated if something big changes happen on it like a sudden pump or dump.
We cannot blame manipulation because it is the core reason why we are having high value bitcoins right now. Manipulation on first sight might be looking like a wrong one but when more people are accepting it then those manipulation is becoming the actual value for one asset. This is what exactly happening with the bitcoin markets like whales are manipulating bitcoin markets in to new heights and then all investors are supporting it and start buying and selling at those high levels.So, corrections and manipulation are part of every market hence we must need them so that we can profit in long run by having huge values
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