It is true that right now we are hard to believe in altcoins since most of them have not really good performance. But trust me that two altcoins (ETH and XRP) are always good to invest. These coins commonly follow the trends in Bitcoin. So, if this year or in 2021, the Bitcoin will have a great season, I am pretty sure that ETH & XRP will probably have a good season as well.
I agree with you that ETH and XRP follow the BTC cycle when it goes up and down. I initially didn't believe it but later I saw the market when BTC was red ETH went directly red and when BTC was green ETH first was green altcoin