The first step of doing this is that cryptocurrency can be accepted as a currency, as the pay method and accepted in most countries worldwide. Without this, this will mean that more things will be hard to do.
Every difficult thing there will always be a way out if all relevant parties are willing to do it happily because cryptocurrencies in general can be used for certain needs and are also used as future investment assets with very good choices even though there are still risks in it.
ANd so far, accepting cryptocurrency as a payment method is still illegal and not accepted in most countries. So, the answer is:
this will be very difficult, moreover the term of "eliminating", seems like impossible.
Accepting cryptocurrency as a payment method is not legal at this time because each country already has its own rules and currency, so if you want to make a realization of cryptocurrency for payments, then there are several things that need to be changed by the state so that nothing conflicts with the basic rules of the country.