During Christmas, I ran a huge backtest with a shell script for Crypto trading (I'll write an article about this later) on my Raspberry Pi 4. It stressed the CPU on 100% for 3 days. The result of this backtest wasn't convincing, but on other hand, I also tested the cooling of Raspberry Pi. Let's see the result:
As you can see on this graph above (Thanks to RPi-Monitor), the CPU temperature wasn't more than 71 Celsius even after 3 days stress test. It's great news because the throttling limit is 80 Celsius. You're good under this temperature.
As I mentioned in my previous article, I use Armor Case for cooling down my Raspberry Pi, this is the cheapest and most efficient (passive) cooling method based on my experience.