During the adoption phase the value needs to appreciate. Think about if you wanted to use a currency to do a $1 million USD transaction. If there is only $500

During the adoption phase the value needs to appreciate. Think about if you wanted to use a currency to do a $1 million USD transaction. If there is only $500k of that currency in USD terms you are going to have a hard time. So the value of the currency needs to be an order of magnitude or more above the largest transactions it will accommodate.