Bitcoin is the prime choice for long-term investment. Altcoins are the way to make profits in the short term. Altcoins are more risky than Bitcoin. Learn more about the project itself before investing in the altcoins you see. Don't be fooled by "surfaces". Many altcoin projects are scams. Don't trust strangers easily. No one wants others to be luckier and richer than themselves.
People have seen the wave in altcoins and they want to invest shortly and go away afterward when they've made a profit. That can't be helped and changed because that's how they perceive the market.
It's true that many of them are scams and those type of investors are prone to it no matter what they try to achieve and the way they pick their altcoins to invest, that's just going to hit them hard later on when the altcoin they've invested is unknown and runs away.