It's always hard to buy a stock that's trading at an all-time high.

If you're not willing to buy shares at or near all-time highs, then you might never get a chance to invest, and you'll miss out on a huge opportunity to boost your overall returns.

As one of the original FAANG stocks , Alphabet has seen its stock soar since its 2004 IPO.

Perhaps best of all, even though Alphabet has risen to all-time highs, its stock performance has lagged that of other FAANG stocks.

Add all that up, and Johnson & Johnson makes a healthy choice for anyone's portfolio even at all-time highs.

The Latin American e-commerce king has seen its stock nearly triple in the past year, and it's up 18% just since the beginning of 2021.

Now that more and more people have come to see the convenience of online shopping, electronic payments, and the other important features available on the MercadoLibre platform, the sky's the limit for the stock to reflect the company's growing dominance of the region.

There's always a chance when you buy a stock at an all-time high that your timing will have turned out to be poor.

However, in the long run, it's the strength of the underlying business that determines whether stock prices rise or fall

MercadoLibre, Johnson & Johnson, and Alphabet all have the staying power to deliver solid returns to investors over the long run