Growing in market cap doesn't necessarily means manipulation of price will decrease soon, like for example the recent elon musk who people consider as the saviour of modern world making a fuss regarding crypto, as much as I'm happy enough that elon really bring the price of bitcoin up, I must say that these kind of things look kinda like manipulation.
If by some tweet from a rich influental people alone could decide whether the market gonna be bearish or bullrun the crypto market as a whole isn't really manipulation free doesn't matter how much the market cap has been growing since the manipulator doesn't target the market cap and using their resource to manipulate it but the manipulator affect psychology of the people to make them behave as they like.
Yeah, It can be more often to happens especially when many rich people come and join the crypto community. It sounds like we don't see a decrease in manipulation but instead, we saw it more. We can see how Elon manipulates the market and also the minds of others, that seem to happy seeing the price goes high. But above all, there is one thing I have to worried about, and what if these people will control the market and let everything handful to them. That could be the worse thing ever.
I doesn't mind when people like Elon influence the price, they are public figure and everyone sees that. Manipulating the price from the shade is what I don't like and I really believe that with more money in crypto that would be harder to do since it would need more money to do so.