Altcoin is not increasing for so many days. New money is not coming in market.So Always invest in good Top 30 Altcoins for being Safe.
yes you are right investing in the top 30 coins will minimize losses. and since the beginning of 2018 until the end of 2019 yesterday the altcoin market was red. almost all altcoins lose their value. and actually it's a good opportunity to buy and add coins.
and earlier this year when bitcoin experienced an increase in the altcoin market going green. this proves that when bitcoin increases altcoin can also pump.