how to choose a bitcoin contract?

[gpucoolingmethod]

is there a contract that mines a most profitable coin at the moment?What is the name for that?

[AvalonMiner]

You mean a multi-pool. Which mines the most profitable coin?

[gpucoolingmethod]

After doing two weeks f searching it seems gpu are too expensive for me right now...
so im thinking about a contract so i have money for gpu

well it doesnt have to be a contract with multipool (it seems that since mining most profit coin contarct instead of btc contract = more money)

 it can just mine btc but what is the best contract right now?