I've been rolling a 5 quantity long @ES since 2022. It hit stop once, made 30%, lost 10%, I waited for the next contract, entered again it just keeps printing. I intend to keep going for decades. Should have started earlier.
The average person would be unlikely to be able to stomach holding a contract as each one moves the same as holding ~$250,000 of the S&P500. You get this by putting ~$25k down. A 10% move down and you are wiped, a 10% move up and you double your money.
However they do offer micro contracts which are $25,000 of S&P500 for ~$2,500.
You can find the contract specs on the CME's website here [0]. The implicit leverage is actually a bit greater than the parent comment says. The contract notional value is defined as $50 x Index Value, which is currently around 6500. So the contract represents close to $325,000 and the exchange's margin requirement is around $21,000. Interactive Brokers seems to require similar margin [1]. The margin requirement is around 6.5% of the notional value, i.e. 15x leverage. So a 6.5% decrease in the S&P 500 would wipe out the account.
Not sure why the parent comment is downvoted, I suppose it has a moralizing tone?
[0] - https://www.cmegroup.com/markets/equities/sp/e-mini-sandp500...
[1] - https://www.interactivebrokers.com/en/trading/margin-futures...