Whatever new altcoins are risky what is known to all but what sign should be noticed before investing altcoins?
Before those warnings, there had really been some bad experiences that most investors had with some shitcoins. That's why it's greatly advised that investors exercise caution before investing in any of those altcoins, so that they will be aware of the risk involved and be able to take full responsibility for what the end product of their investment will yield. It is also advised that a newbie learn about Bitcoin and invest in it before thinking of any other altcoin. Sometimes even those altcoins can appear to be very real and also list their token on some recognised exchange, but they can still fail at the end of the day. The token can just lose value, and even the exchange where it has been listed will just delist the token.