To determine the change in purchasing power of the USD when measured against Bitcoin, calculate the ratio of the old price to the new price:
Purchasing power remaining = (old price / new price) Γ 100% = ($0.07 / $121,641) Γ 100% β 0.00005754%
This means the USD has retained only about 0.00005754% of its purchasing power in Bitcoin terms compared to 15 years ago.
Therefore, the purchasing power lost = 100% - 0.00005754% β 99.99994246%
