I'm kinda agree with you though taking an advise from experts or friends will help you to choose a right coin but the final decision still lies on you because it is your responsibility to make a proper research before investing on a new coin and if things go sideways then there is no one to blame but yourself because you didn't ask someone to buy the coin for you.
Bitcoin is still good to buy as it was showing a signs for bullish run though adding other cryptocurrency on your portfolio is not a bad choice either because there is possibility that their price will go up too in the future.