Is it really worth it trying to find a good investment firm that will invest your money with a good performance?
Of course, there are some good firms, but there are much more bad firms (surely 8 bad ones for 2 good). So, your chances are at least 80% to do worse than the S&P500 with a specific firm. And there is surely a substantial percentage of these firms that are simply fraudulent. Let's never forget this.
Is it really worth it trying to invest by yourself? Making lots of mistakes buying crappy stocks that you should never buy and having lots of stress about the market? Doubting constantly about your stocks, trying to find something better, buying at the worst moment, selling at the worst moment? Having a performance most of the times worse than the S&P500. Sometimes better, but with lots of effort or chance.
Buffett said that and many others said that. And now, having seen the performance of many firms for the recent years, I'm pretty sure about it: the S&P500 (SPY) or any index that reproduces its performance is the best place to put your money.
Wether you own 5000$ or 1 billion dollars, just put it all there and stop thinking about it. Collect your annual 10%, year after year, until you die, without any effort.
That index doesn't try to look smart. Or doesn't try to impress you. Or doesn't show you made up numbers.
Many investment firms try to do all that.