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I remember years back that i even wait for the code in instagram to take 20cents to play lol.
but most of the time i lose my chance

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Duelbit becomes on of the most popular and used gambling site now so yeah small capital is enough to make way to win big.
It could be enough if you hit some great luck the moment you used that capital. But it is always not sure to be enough to win big. Keep in mind that winning is not guaranteed. Not because someone made big wins from small capital means it is easily be achieved.
Also, if I'm right, I think Duelbits is just around 1-year old crypto casino.