This year, I haven't seen an altcoins that is independently growing without following the movement of BTC, and this year BTC's dominance rate has increase significantly and with that, its almost impossible for altcoins to rise on their own, whether we like it or not, we have to understand the current trend now.
so yeah some altcoins can be independently growing without following btc movement, but the most altcoins follows.
These are good article about correlation to read.
https://www.longhash.com/news/altcoin-prices-have-never-been-more-closely-correlated-with-bitcoin
https://info.binance.com/en/research/marketresearch/crypto-correlations-q3-2019.html
https://hackernoon.com/about-those-crypto-correlations-e68720707efe
https://www.forbes.com/sites/cbovaird/2018/10/16/is-the-correlation-between-stocks-and-bitcoin-real/#4656c4b96146