Perhaps if there are let's say 100 people starting 10-50 different digital businesses/person that accept btc as the only choice of payment it is possible, and they only accumulate coins, never sell them.
I'm gonna go ahead and assume that those bitcoin businesses sell what all bitcoin businesses sell: hopes and dreams. While the industrial moguls live in Mom's basements, eating Mom's food.
Because ordinary businesses have expenses: overheads, salaries, restocking merchandise, taxes, etc., etc. Which necessitates spending.