Investing in new crypto coins is a big risk. You can make big profits, but you can lose all your assets. Even after studying the project, it is impossible to predict the future fate of the coin, because many factors affect the development and success of the project. And it is on them that the further path of the coin depends.
Not doing at all is risky as well. Can we say living the life is risky itself, there is no way a day goes by without facing difficulties, that's how altcoins is if you ask me.
Why do you think investors keep buying these token hoping to make profit? We can only try and research, market force is the only thing that determines the success of a projects.
I could remember when yearn finance was launched, I followed the project back to back an watch the price peaked to $2k and I never bought at that points but yet others kept buying and finally binance and coinbase listed the token, people fomo and price tick $40k.
Those who bought and hodl at presale would be a millionaire by now especially those who hold heavy bags and whales.
In conclusion, we can only keep trying till we make it from one or two but there is probability of failure.