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What if no comments has the exact price ? How would you choose the winner ;)?

Probably nearest wins?

Nearest win :) You should also use a lot of decimals, unless you want to share the price with someone who has bet exactly the same number

Okay 10,700

From where do you take the price? CoinMarketCap or a specific exchange?

Good point! I will take from coinmarket cap. Thats OK I think.