im prefer to buy more on etherium, if you really want invest, hold your eth and btc until 2021, you will get big profit like 2017 did.
yes you are right, but it's not bad trying to buy another altcoin too. moreover monero is one good coin. and down 20% is a good time to buy. if I had money, maybe yesterday I bought it. if my prediction is correct, there is no need to wait long even until 2021 to make a profit. because soon the market will return to ATH.