That's mean your friends doesn't know about trade am i right? Otherwise one ways you can recommend your friends come crypto market and do invest in good coins. Even you know if you have good skills in trading then your risk chance is to low so quote to the most important thing learned and follow professional traders. For fake signal after all these many telegram service so i like avoiding.
One of the worst things in crypto, following the signals from the unknown person. Before joining crypto trading we should have knowledge about the trading because the crypto market is completely different and basic things are very important, before investing we should research about the coin we are investing and it will help us to make a profit.