Diversification does not get rid of the risk of dealing with investment losses. Margin trading raises risk of loss and contains the potential for a compelled sale if account equity drops below required levels. Closest will use whatever deal was the closest futures contract around the date from the https://financefeeds.com/looking-for-a-20x-to-40x-altcoin-consider-this-ethereum-eth-and-cardano-ada-killer-cheap-under-0-30/