Having the basic knowledge about Bitcoin is what we need to kick start investing in Bitcoin, while learning other things with passage of time. If you consider learning all about Bitcoin before you start investing you will end up not investing and it will cost you spending lot of time you could have use to buy Bitcoin because the knowledge about is so vast that even an older investor doesn't know it all, it is best you get the fucking started with the basic knowledge while learning other things along the line, Bitcoin is still a growing asset, there are alot to learn getting in to the field when you starting investing.
Exactly it is mostly best to start with just basic ideas especially with Bitcoin. If we try to learn everything before we invest we might never start and we could miss out many chances. Bitcoin and how it works are always changing so even people who have invested for long time are still learning new things. We should learn main things first and then learn more as we go. It is like learning to swim we do not need to know all science of water to get in and start swimming. You are also right that Bitcoin is still becoming more popular and there is much to learn as we start investing. It is like learning adventure.