Stockpiling resources does not lead to more panic. If anything, it serves as a measure to alleviate fear and anxiety as people feel more prepared in the face of the pandemic. Right around when stockpiling resources became a widespread practice, governors all across the country and the world were declaring states of emergency. On March 11, 2020, WHO- World Health Organization- characterized it as a pandemic. 
During such times of uncertainty, the only clear piece of information that was constantly repeated was to stay at home and practice social distancing. Such measures would only be possible if people had plenty of food and supplies at home. So as people began to stockpile, they were essentially taking all the right measures to participate in the lockdown. They were simply preparing themselves for this time of uncertainty. As more and more individuals and families started feeling more prepared and became adjusted to the new reality, they were able to spread this positivity and message of resilience to their family and friends. This could have only resulted in less panic and strife throughout the community.