Rule #2: Never forget about rule number 1 (cuz if you start losing and dont remind yourself about rule #1, you will get into depression real fast and it will kill you inside out)
Crap out of the way. Do your own research as other people suggested. Don't put your money into something just cuz someone told you to do so.
High reward comes with high risk aka ICO and altcoin. I wouldnt call all of them scam, there are many reasons why ICOs and altcoin might not end of being successful. 90% of the startups FAILS these are no different.
trust? it's mainly opinion based when it comes to alt and icos.
"I know this x guy personally a great guy, he is a great CEO. I trust him. He wants to go to Mars in 5 years that's what he is trying to sell" I trust the guy but iffy abt the product. You get the point. The only outcome is going to be opinion based. If the product does get some success, it wont be an ICO anymore....it's a gamble at the end of the day.
That's why investors need to know details and try their max to choose right and trustwortht ico.