I have surveyed but not all altcoins, only a few. It can be said that on average they are very vulnerable to correction if BTC goes down. Maybe from me at this time ZIL is the right one to buy, ZIL's performance is really given a thumbs up now, but if you trade and look for data, for example, those who were previously competing at CMC, for example $MANTA or $ALT, my advice is don't. because traders tend to sell when prices rise only a little.