If you're more comfortable focusing on one thing for a while then you should do that, if not it'll be useless.
If you're a newbie here I think trying to get a broad sense of everything is a good start. If you're focusing on one thing you'll have to keep going from widening your content exposure to reducing it (repeatedly) and I don't think that's a good way to start unless you don't know how to find other things or only have one specific interest at the time you started here.
If you're interested in crypto you'll do much better being interested in that on here than you will be by having interest in the forum (a lot of users a skeptical of newer users who try to police the forum too as soon as they arrive via reputation topics and trust).