That's why a traditional currency is not susceptible to this while bitcoin is. Because of this, at some point the scarcity of bitcoin will reach such a point that they loose all their value as so few people will have them that they have no value for exchange.
I think you don't understand how supply and demand work. If demand stays constant while supply decreases, prices go up, not down.
Also, the opposite of "gain" is "lose". The opposite of "tight" is "loose".