Does the amount of money raised in an ico determine the success of the project??
Is a necessity to do a fund raiser in order to start up a project??
Did satoshi nakamoto and vitalik also started a fund raised??
Not really, i have seen some success projects but they didn't raised too much funds, only about 1 million USD.
to starting a project, of course funds are needed to build it. But if you already have enough funds, it won't be necessary to raise more funds.
I think Ethereum was running ICO, selling their ETH at certain rate.
This project should be done because you can find out for yourself if the funds you get are enough that will make the long journey of your project happen and meet your expectations. But some projects will continue to add funds that they have already achieved before.