wtf he turns 16(!!) dont tell him to visit prostitutes you guys , unbelieveable -.-

congratz to you first

5,5 btc could be much depending on where you live but i would suggest a short/long trip to a location further away where you you have never been. and if you have a girlfriend trust me she would love to go together with you ( a lot of bonus if you can pay for her of course  )

have a cool 16th bday (dont use your bday to drink yourself with alcohol to death)