if enter a lot of money in the crypto market, I believe that the volatility will not be very high as it is today, at least we will not see high increases and followed by very large falls
Partially yes, a lot of money can make the price more stable for cryptocurrencies. But where get these all money? The most controversial thing that people don't want to invest in cryptocurrencies by high volatility and fix this volatility could a lot of people with a lot of money
And that is wrong thinking. Bitcoin and altcoins are not the way to get rich over night and as soon as some realise that they end up deeply disappointed. If you are smart and experienced trader and investor you can make decent profit over reasonable period of time but it's not likely that you will become rich. Dealing with Bitcoin you are exposed to risk all the time and occassionaly you will make some mistakes too, so that should you count on.