actually, you dont need convert your money to bitcoin. gambling or pay the stuff, it can use your real money.
bitcoin just medium to transaction with other money, i mean virtual money. bitcoin created for transaction, and just for believer. if we believe with bitcoin, we can pay or do something with bitcoin, it just thing like money.
but now bitcoin have high value, it cause of demand's market. i dont know, but im sure it use to trading and other thing like that like investment.