The fixed quantity almost guarantees that digital "assets" can't fulfill their original advertised value, their ability to function as a currency. Seems to me to be simple supply/demand market dynamics. Fixed quantity eliminates the ability to match supply with demand in order to keep exchange value stable, and without stable exchange value both buyer nor seller take risks in tendering or accepting BTC in a purchase. The buyer risks losing future appreciation and the seller risks a currency that may flop in value.