I been scammed few times from this type business !
Their name are

Mark Harry
@harryjames123

They first ask for investment from 300-1000 USD and can get teturn of 10 time of profit ...
After you sent and waiting for 12 hours due time , they claimed that we unable to withdraw money due to over mining ...
Ask agian for 850 USD ...
After you sent the amount , another issues you need payment 530 USD for the called signal card ..
After teceived this additional payment , still unable to withdraw and said need second signal cards due to withdrawal amount os big ...
After you sent this said to be guarantte final payment and wait for their payment ...
However , unbelieveable you are again ask for 10 % of the total profit , 1583 USD , after the he ask me to pay 40% of it and become 673 USD , finally he ask me to make a last trust to him to prove his sincerelity and I sent another 673 USD to the address he requested , that addreas is the last minite changed as per his reuested , I sent the screenshot to him for approval before sent ! I sent him all transaction proofs and Blockchina transaction evident proofs as well to show that the money already sent to his account !
After half day , he told me that he never receive the money and said that I sent to wrong account ! I would like to send him our conversation proof but I found he deleted some meassges and some evident lost !
He just insisted that is my fault and refuse to pay me money that he committed .
End up we have to stop this due to endless of reasons to cheat you money ...
That are their tricks ...
They can just not receive your money and disappeared ...
All kind of scammers around ...
Never be trusted ...
Most of them claimed to be from the “ State “