Sadly one of my friends have that same feeling. He jumped into cryptocurrencies just to make money and he dropped like 1/3 in dollar value. Now he regretted getting into altcoin markets he seek for bitcoin investments.
Many people jumped into the BTC market by the end of 2017. At that time BTC prices soared to as much as $ 20,000. Many people became rich and they introduced many people to join. They came in and bought at high prices, but unexpectedly btc prices fell more than half. And now many have lost money and regretted it
Jumping into bitcoin is not a bad idea but having altcoins is also good. Sometimes altcoins are faster than bitcoin and they can give much greater profits to you compared to bitcoin profits. This is a fact to prefer altcoins.