How to stay motivated to finish the Duolingo tree?

I have a Duolingo streak of 46 days and I want to finish the tree but I don't feel motivated and do it. Probably I will finish the tree in 7-10 days but all of a sudden I lost my energy to continue. Now I do only the easiest lessons so I can keep the streak.<br><br>Do you have any tips for this? I want to keep the streak longer than 100 days, so I'm close to it but now I am so unmotivated.