I heard this about NVDA in 2020 and 2021 and 2022 and 2023 and 2024 and 2025 and now 2026… if the stock is going up it is 100% time to buy if you know what the F you are doing. if you don’t know what you are doing then you sell when the stock is going up :)
For one, Mr Buffet coined the aphorism “be fearful when others are greedy, and greedy when others are fearful” and here you are suggesting the literal opposite.
Good luck with that strategy.