What’s a stock that you’re down significantly on but still have conviction it will go up in the long-run?

What's a stock you're down on significantly but you still have strong conviction it will be go up in the long-run?

Mine would be MRNA, i'm down close to 50% on it but I still believe in the future of the MRNA technology and their branding over the long-term, they have a ton of things in the pipeline that look very promising.