By just sitting on your coins, instead of using them, Bitcoin won't grow!
That is a myth, sir, and I mean to slay it!
Wealth held in bitcoin represents wealth that was formerly held in fiat. Every satoshi - every cent - makes the network stronger and more valuable. We're growing a baby black hole here, the more mass we feed it the bigger the event horizon. In other words, HOLDING IS GOOD FOR BITCOIN AND DEADLY TO FIAT!