Before I start: do your own research (DYOR). This is not financial advise.
Just keep watching how altcoins perform as a % day by day. You can easily track that by downloading an App called HODL or CoinFolio. I noticed a few altcoins such as Lisk (LSK) or Cardano (ADA) perform super strong even on a totally RED day. Just watch for these GEEEN islands in a sea of RED. They could be
- future strong performers (I am still looking for the next Bitcoin, please post your ideas)
- an early indicator which moves before the likes of Bitcoin or Ethereum move upwards.
Good luck and enjoy your crypto portfolio! Cheers!