The number of people who happily say "I started building up my supplies last month, last week" and who then go on to berate "panic buyers" and "stockpilers" is irritating me.
So your "supplies" stashed away were driven by anxiety and self protection. How is that different from today's panic buyers? It's just you were ahead of the pack. That's the only difference.
The "I was sensible and saw this coming and did the right thing" would be utterly meaningless if everyone had done that.