No it won't be 22 billion. But 4-5 billion by April is very possible. Just wait till hardware is marked down which will cause more irrational buying. These ASIC chips and boards probably cost $50 each. ASIC manufacturers will adjust accordingly so they can continue to sell equipment. The ball is in their court.
Or not. The DC regulators on the board cost more than that.
Can ASIC prices come down? Yes but even with free ASICs the balance of the system is still going to have some cost and those costs are unlikely to get massively reduced over time. An x00 watt PSU is going to have a non zero cost. PCB creation and assembly, DC regulators, even mundane things like fans, heatsinks, cables, and cases. There is no Moore's law or massive markup on these components. With free ASICs you still wouldn't have $50 boards.