Have you ever experienced a sudden drop in your portfolio value that made you worry? Any advice for the unexperienced?

Ok, so I've been investing in crypto for a few years now, had to cut losses more than once and certainly I've panic sold at moments where, in hindsight, it would've been better to just wait.

I've recently been reading comments from people in the sub who just started investing after the dip and haven't experienced a drop in their portfolio value yet. With the recent speculations and news about Bitcoin, Ethereum, and other alts being on a bullish trend, some may not be prepared or aware of the possibilities of perceiving losses, or how frustrating it can be.

So, let's show some love for the newcomers and share some advice for those difficult moments when your portfolio takes a sudden drop overnight. What do you do to stay calm and not panic sell? How do you regain confidence in your investments, and what strategies do you use to bounce back?