Yes, I agree with you on this, when BTC is pumped up, there will be good altcoins that will be noticed by many investors and that altcoin will increase accordingly, Ziliqa Nano I also know them and also holding a bit.
No, I think this is a bad time for the alts. Currently in some groups there have been many pressing experts about the recent rule of the crypto market:
Bitcoin pump => altcoin stable or just increased a bit
Bitcoin dump => alts dump x2
This rule shows that investors are paying close attention to bitcoin. Therefore, buying alts at this time will lead to buying at high prices.