I have been using it for a while and there is no way they can steal your funds and btc as the API kets are without the withdrawal options,
It is not a great or the best app, but it is a good one with its risk. copy trading is always a risk. I have tried several similar services: some of them made me lose, some make me win, but it depends on the traders.<br />
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Coinmatics team, if you are reading this, please tighten the entry threshold for traders.