This was the project chosen to scam small investors in Mexico between 2017 and 2018. By an alleged mining company, Paydiamond, which started in Brazil, extended its pyramid scheme to the north of the American continent.
It offered packages with a price ranging from 200 to 36K USD, to acquire Diamonds in a mine in Africa. Investors would receive earnings of 5% weekly; Earnings that they always reinvest.
When the rumor that diamonds didn't exist spread and investors asked for their money back; The speech changed, there were no diamonds, but all his money would be returned in Bitcoin or something like BTC; That something was MktCoin; For each dollar invested, they would receive 1.2 MLM.
Some investors, who knew little about cryptocurrencies and trading, accepted the exchange; The platform where his "money" was deposited disappeared months later.
In several countries, there are Class Action Lawsuits against Paydiamond and leaders. But not from MktCoin.
The widest market for MktCoin is SouthXchange, with 4 pairs (BTC, USD, LTC, and DOGE).
It was listed on Crex24 in mid-August 2020 for ETH, BTC and USDT. When developers were back on Twitter.
I don't want to give a bad opinion about this project. Cryptocurrencies, like money, are used for multiple purposes; Their project creators are not responsible for the use made of their Project. At the moment, I do not know if MktCoin and Paydiamond are accomplices; That will be determined by a judge, when the case is resolved. There are characteristics that make it seem dubious. I suggest you, be careful.