Since gamble site kindda risky, you can invest on your own for example if you have shop to handle, you can use it to expand your shop globally so you may have alternate currency. And if you have more, you can spend for help advertising your shop !
So far this is the suggestion that is convincing for me. But I would say that 1 bitcoin is not enough.
Especially for plans like this, it is really not enough.
1 btc is quite a nice start to make it grow. Its either you start trading sell and buy and so on rotating it till it grows, or if you are a sports fanatic and bets on a team then try it on since the choices are few.
As always we already know that trading is very good program to earn money but i would really advice that OP should split his capital and find another alternative one to earn money like having an lending option so if one is fail there is another program you can really on since we know that all investment existing are nor stable the same as coins so we can still earn if our tradings are not in good shape.