I dont know about the challenge.
If you want to know whether saving in fiat or bitcoin, which will yield more profits at the end of 52 weeks,Bitcoin would yield you more profits.Even though bitcoin price is highly volatile,now in the current situation,Bitcoin is performing very well.We could see that on the first week of january, most of them predicted that bitcoin price would fall to $500 again, but it didnt happen. Instead bitcoin price recovered from $750 and now its almost around $1015.