This script hides all cryptocurrencies on coinmarketcap.com whose are not exchangeable on Shapeshift.com

coinmarketcapFilter.js

// 1. navigate to https://coinmarketcap.com/all/views/all/
// 2. open console (F12)
// 3. insert this script and hit enter
// 4. currencies which are not in the shapeShiftCurrencies array should be hidden
// 5. optional: run this script again and it will show back the currencies.

$('.no-wrap.currency-name').each(function() {
    const shapeShiftCurrencies = [
        'Bitcoin',
        'Ethereum',
        'Golem',
        'Siacoin',
        'Aragon',
        'Basic Attention Token',
        'Bancor',
        'Bitcoin Cash',
        'Blackcoin',
        'Bitshares',
        'Civic',
        'Dash',
        'Decred',
        'DigixDao',
        'Dogecoin',
        'Edgeless',
        'EOS',
        'Ethereum Classic',
        'Factoids',
        'FunFair',
        'GameCredits',
        'Gnosis',
        'Matchpool',
        'Iconomi',
        'Komodo',
        'LBRY Credits',
        'Litecoin',
        'Melon',
        'Metal',
        'Monacoin',
        'Namecoin',
        'Numeraire',
        'OmiseGo',
        'Potcoin',
        'Augur',
        'Reddcoin',
        'iExec',
        'Status',
        'Startcoin',
        'SingularDTV',
        'Swarm City',
        'TokenCard',
        'WeTrust',
        'Voxels',
        'Vericoin',
        'Vertoin',
        'Ripple',
        'Zcash'
    ]


    let currencyName = $(this).text().trim();
    if ($.inArray(currencyName, shapeShiftCurrencies) == -1) {
        $($(this)).parent().toggle();
    }

});