All you need to do is show them that the btc froth is faster then their 401k…
Idk, maybe your parents are built different
I gave my mom .5 btc when it was @ 150 a coin… She has watched first hand how btc has out performed her 401k
I did the same with an old green wallet she still has. She's seen it grow for many years but just says "yes its nice", then proceeds to ask broker where to put money because nothing is generating growth... Bitcoin Mother. You literally just saw your Bitcoin go up from $500 to $70,000. Idk what more to do.