To be honest, investment is always risky within or out from cryptocurrency. However, without correct knowledge to base the crypto investment is much risky. Entering crypto without knowledge is like entering the danger zone. For now, the top 7 are good to buy and hold for the long run.
Yes, it would be better if everyone who entered the crypto space had knowledge beforehand, because without that or the knowledge to master the crypto space, it would be very difficult to find profits, because profits also often go with luck, so it's clear in this case This is that don't enter the danger zone if one doesn't have enough knowledge to deal with it.