Explain why you think if everyone held it would devalue the bitcoin?
My reasoning in suggesting more people should hold is basic economics theory.
Price and Demand, the lower available coins or sells should cause an increase in price because their will be a higher demand as value increases.
In addition should attract more goods and service companies because bitcoin will show more stability.
Stability without velocity is not helpful. BitCoins need to be moving as much as possible to be a viable currency. The shortest path to viability for BitCoin is to have a healthy volume of exchanges between BitCoins and established currencies.
What good is an $80 USD price on a BitCoin if selling 100,000 of them will crash the market? Getting stability by reducing volume will only produce the illusion of stability.