$BTC Opinions of world leaders on the role of Bitcoin in the economy differ. While some countries are considering the possibility of creating Bitcoin reserves, Japan has taken a wait-and-see position. This decision may affect international competition in the field of digital currencies.

Additionally;

* Reasons for refusal: Specify the specific reasons why Japan rejected the proposal (e.g., market volatility, lack of regulation).

* Expert opinions: Provide comments from experts on the impact of this decision on the cryptocurrency market and the economy as a whole.

* Comparison with other countries: Compare Japan's position with that of other countries that are actively exploring the possibility of using Bitcoin as a reserve asset.