There is no such thing as your own decentralised trusteless crypto
These centralised attempts I think will fail hard.
Bitcoin is the true global currency the first to wise up and get on board will be the countries that benefit the most.
"When the winds of change blow...."
I think the same too. Countries having their own cryptocurrency is like money we have now in different countries which doesn't makes sense to a digital currency.
However, I do think that alternative cryptocurrencies may exist if it is going to be used for different purposes or applications.