as it has been repeatedly mentioned, there are a lot of scammers in the ico market and it is possible that your investments can be lost. Proceeding from this, the best investment option is buying coins already on the stock exchange.
At the same time, if you buy something on the stock exchange, it's better to take either a stable position. Or something that appeared recently but showed itself well. There are not many such projects, but the investment will not be so risky