<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.bilionea wa umri mdogo zaidi ambaye amejitafutia utajiri wake ni john collison, 27, ambaye ni mwanzilishi mwenza wa kampuni ya stripe.  <response>: while the youngest self-made billionaire is john collison of stripe, age 27. 