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.
I agree with you brother, maybe hold a larger percentage of eth and the rest do invest it in different altcoins but alts are risky so choose good altcoins.
