When Solana was at $30, a friend called me and said he was broke and he needed a coin that could potentially increase in value by at least 5% within a month. At that time, the market volatility was quite high. I suggested he buy SOL, which I didn't expect to fall below $25 but rather increase to $50. He bought a significant amount and made almost 2x his investment. He even praised me and insisted on giving me a share, which I tried to refuse but he was insistent.
You did well, but, still - it may went out differently, so, your friend should have done his own analysis beforehand, even having you as his advisor, sorta.
Still, I am happy that's how the situation turned out for him.
It's possible, and we don't know that his friend not only accepted the advice, but could also have done an analysis before actually deciding according to what his friend said, and we don't know that.
I think, as an experienced person, it is certain that every advice will be re-analyzed before indeed deciding exactly what to be executed, because if there is a mistake, the one who loses is yourself.
Advice from friends is necessary, but always be more selective in determining the next step.