if we do barter it is not wrong in certain conditions, but I think that means we are going backwards in the world of economic civilization, because the money was created to overcome the problem while doing a barter such as the different needs of two people who make this transaction can be overcome by using currency
Barter system was thousands years ago, then gold and silver started and then paper money. Now is the era of digital currency and the world is turning towards digital currency. Crypto is the best option to fulfill this desire for using digital currency throughout the world. I think this is the last thing we will use as regular currency and will not be replaced by anything else.