Actually the word coward doesn't work in the field of economy. Here everyone is running for making some profit, and to make profit we need to be a bit coward for some time.
The word coward is for those who didnt invest. If you invested youre not a coward because you already invested. The issue of being coward is because of the risk that many take in investing into crypto or bitcoin. But taking the risk is always the opportunity to see the best in what you invest.