Funny, I was wondering about that too last night, how much new money is needed for a certain rise in market cap. And I was surprised how little money is needed. I used a rather extreme situation to make that point: Take 1,000,000 Maid, drop one of them on the market for $1 and let people start trading. After 99 trades each for a $1 higher price, the trading volume has been ~$5,000 and the new Maid price is $100. Market cap is now a stunning $100,000,000 however, with actually only $99 new money coming in!
This is not real life of course. But it indicates that it needs only a fraction of the actual market cap to bring up coin price and coin market cap. It also gives you an idea that having wealth in crypto is rather relative. It needs a healthy liquidity to cash in that wealth.
@neo, thanks for your extra food for thought.
Edit, great article about this subject.