Altcoin portfolio is more risky, but at the same time, they often grow better. But I prefer to keep a part of my portfolio in BTC and USDT, waiting for some good investment idea in short term and increasing amount of BTC. Also, I hodl EOS and BNB altcoins in long term.
Yes, I agree to invest indiscriminately in altcoins, a dangerous occupation, BTC, ETH, this is probably the safest way, of course, you should always keep fiat money as part of an investment portfolio.