The founder team, which remains unknown, promises 1300% ROI in 29 days during ICO period. Not only that, the whitepaper was not available until the 4th of Aug 2017, 3 days before the pre-sale begins, and the product was an only bitcoin copycat.
Founders claim to be working on a Plexbank, PlexCard and PlexWallet, which would have enabled users to withdraw their Plexcoins in fiat currency easily from ATM machines, exchange their Plexcoin for other cryptos and invest their coins in the bank with a fixed ROI and with no exposure to the market's volatility.