FOMB?

Hi all, super new investor here so be kind and please forgive my utter ignorance.

So, I jumped on this back at 4.2c and needless to say I have been delighted with recent performances.

So I'm well in the green which I'm over the moon about, but I can't shake this fear that this might be my only chance to jump ship while it's afloat.

I have no reason to think that this stock will go down, other than the fact that it's has recently shot up and now that I have skin in the game trying to make predictions that are unbiased is proving to be difficult.

So question is, do I have a fear of making bank? Why can't I be optimistic and aim for Jupiter instead of just the next street?

Cheers