Taking a cursory look at cryptocurrency, I will suggest ethereum, because it still has the potential to go up faster than anyone could envisaged. Investing in new altcoins however, I may not really counsel anyone, because they are still not fully tested, and overly trusting on something which has not been tested could be suicidal.
I agree with you, new altcoins untested, and the level of risk is enormous. Anyone would want to get a big return from their investment, there are so many altcoins that have good potential, Eth is still the main hunt for investors, then followed by Bnb, Waves, Xrp etc, try investing in it, because coins with good potential will be easier to get profit.