Don't get nervous. Some altcoins always follow BTC, which is up again. I keep now my BTC and alts. Seem to generate good passive income.
Of course, if believe, HODL!
The artificial drop (IMO) across board, to the minute, is not reflective of peoples' actual actions at time.
Individual coins' value is being over-seen, and controlled, IMO.
EDIT: For a price drop across the board (CoinMarketCap), the answer to my question, is that BTC directly, and IMO should not have, direct influence as to the real-world value of another coin/ project. Full Stop. Remove the BTC own issues, IMO, to not allow to affect others' progress...