I no know about any other person oh, but i didn't need any external source to learn how to secure my bitcoin. I don dey this forum for a long time now, so most things wey i learn about bitcoin na through this forum.
You'll be baffled the amount of information we have on this forum just at your disposal only if you have the urge to surf constantly and read across
as if you are reading through an interesting magazine. I've learnt a lot from this forum and this forum has also prompted me to learn a lot of things that have helped me across different sources.
If I should narrow it down most times I either use the forum , bitcoin wiki or Wikipedia. Wikipedia is really amazing only it may seem boring to a lot of persons if you are looking for a fancy interface and not some newspaper kinda layout.