All-time highs aren't a sell signal
One of the more counterintuitive market stats I’m aware of (if not the most counterintuitive) is that market returns are actually better, on average, following an all-time high than at other times. And it's not just the short-term (1-year) returns that are better, but the 3- and 5-year returns are better than all other time periods too.
Let this be your reminder that all-time highs may not be a time to sell, but to stay the course. Or maybe even, to double down.