Once we adopted the crypto world, then Fiat currenty will eventually crashed, still it will come in few more years or more decades. Statistics shows that only 1% of the total population are into cryptocurrency so we still have more years to enjoy the fiat before it will be totally worthless. For now, we should support crypto all throughout so that our government can see its advantage and will eventually adopt and legalize it.
Usually, crypto is fully adopted by a country when its currency loses value because there is no alternative but to adopt crypto, as is the case with Venezuela.
I am a crypto user but I doubt that the world economic system will be replaced by crypto because there are many complete paperwork transactions that cannot be accommodated by the blockchain. Besides the biggest obstacle is the majority of a country's government considers the adoption of crypto is to open wide potential problems in a country.
I truly hope that the government will find a win-win solution between openness to crypto and the interests of maintaining economic stability, domestic politics. Because all agree that financial technology is inevitable and will be a loss for the government if refuse the invitation.