Germany is a very strong country economically or we can say that it is the leader. They stepped out with this great news which is going to be a big push to crypto. Maybe we will not see that right away, but it is a big step forward definitely.
A lot of implications can be seen to this move. As you mentioned, Germany, one of the leading economic leaders in the world, may contribute to its price in the market due to its legalization and utilization in the country. Since an economic leader has approved of bitcoin being used into its transactions and payment, it may influence other countries as well to follow this move, thus increasing the price of bitcoin significantly.
In adherence to this implementation, this is a huge step forward to the cryptocurrency world as the government of Germany views 'bitcoin' as a LEGAL means of payment. It cohered and harmonized with their laws and this implies that countries may soon be influenced by this move.