With the recent changes in BTC price, altcoin is getting weaker against BTC, so, this is a good time to pick and fill the bag. Another important part is, after BTC bullrun, once BTC get stable, altcoin follow the bullish trend.
Is it right decision to pick some more altcoin?
You should choose altcoin that has experienced the strongest decline in the past year. And especially, choose altcoin with a good foundation and a strong community. Because most altcoin junk is dead, or die slowly and not recoverable.
And the best advice is to keep targeting altcoin in the top 20. Because it has a large capitalization and it is difficult to die suddenly.