As long as you don't advise your friend to buy a coin then that's fine, and if you have told him about the risks then he should already understand every risk that will be faced in trading.
What often makes people feel they are being scammed is that because they don't get the appropriate information, it is recommended to buy a coin with the lure of getting big profits but the opposite happens.
Don't forget to also tell him to only use the money he can afford to lose, because that will be enough to help your friend if the trade goes badly, because losses won't harm his finances.