long term investment is to invest to those companies able to grow from A to A+ in a period like 10 to 20 years.
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$Meta Materials (MMAT.US)$ watech this interview you might have better understanding in MMAT. So far I have lost almist 50% on paper but I still hold it.
https://youtu.be/1c8DfuFNBzE
https://youtu.be/1c8DfuFNBzE
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