CNBC's Jim Cramer opined on two of his favorite long-term holdings — Apple and Nvidia — and suggested their continued success shows that it's worthwhile to stick with good-quality growth stocks instead of trading in and out of them.

"As Nvidia and Apple proved once again today, individual stocks are where the biggest money is," he said. "Provided you've got the fortitude to stick around and you aren't addicted to buying high and selling low – the ultimate result of endless trading."

The indexes ripped higher on Monday to close at record highs, with the Dow Jones Industrial Average climbing 0.14%, the S&P 500 gaining 0.44% and the Nasdaq Composite adding 0.70%. Nvidia led stocks higher after the semiconductor giant revealed it would

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