You can split it up. Keep a certain portion of your money in eth, and invest the rest in alts. Eth will probably rise, but at a smaller percentage than alts, but alts are risky obviously. So if your investment in alts fails, you will still have a portion of your eth.
really what you say, part of eth you save and the rest buy altcoin to get profit, I suggest buy Worldcore .. because the price is down