First things first, I would shout, "BOOM!!" And let my friends know that Santa Claus made a visit to my house and left 50K
Then I would have $50,000 which I would invest. I would ask myself what are the most important things I need the most for myself, and for my family, now and in the long term. After that, I would buy some gifts for my family, which would make them really happy.
By the way, SakinaNasir53, can you share your views as well? What would you do with the 50k? 