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.