I would choose top alternate cryptocurrencies that sit next to bitcoin's throne. I am considering picking them since they have big market cap at $40,291,761,029 for ETH, $25,498,018,545 for BCH, and $9,554,602,928 for Ripple too.
You mean the top three coins but expect bitcoin and ethereum. we will not be sure that other cryptos are having the future growth to put your investment in the best place you have added it thought.
I would like to go with Neo, waves, XMR and XRP. These coins are shows the good growth in the market place supply and you may find the increase in value also.
In these especially Neo and waves increased more than 50 percent of value from the past 6 months.