Not casino. Casino only benefits the casino owner and the people using the casino lose coins. It is not a good idea to gamble.

Faucets are a good idea. The faucet owner makes money from ad revenue. The faucet users get free bitcurrency. Both win. That is better.

Competitive video game tournaments with Bitcurrency prizes for tournament winners is a good idea.
The video game developer makes money from the video game. And people who become good at the game can play in tournaments to win Bitcurrency if they win the tournament. Free to play tournaments without paying anything to enter the tournament.
Both win without anyone losing.
That is great.

Puzzles to win Bitcurrency is a good idea too.