The number one reason not to invest in crypto is the risk that every crypto have, investors always fight and accept every consequences once they invest in an altcoin, two possible things will only happen, success and lost.
Nice thought dude.
But your words are slightly contradictory.
I would say that the reason for someone to not invest in crypto is that, they fear.
They fear that they will make losses.
But when they win some, they say it's their luck.
But when they lose, they cry.
So in order to change this, they need to have confidence on themselves.
Even in other investment apart from crypto we still have losses, I see no reason to have fear when it comes to crypto. It all about courage and determination to understand how it works.