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I agree with you that this can be a very good option, people delay starting their investment by learning about Bitcoin before they start investing, which is of course unnecessary, and as a result they miss out on good opportunities to start their investment. There is no need to have complete knowledge about Bitcoin when starting your investment, you keep your investment consistent and gain knowledge about Bitcoin while investing, in that case your investment is not being delayed and you are able to accumulate Bitcoin holdings at an average price as a result of continuous investment and at the same time you are able to learn about Bitcoin, which is of course very positive. Over time, as you learn to understand Bitcoin, as with that also your holdings will continue building at an average price.
You can still delay becoming a trader if you don't understand how the market works and what strategies can make you profitable - but not with investing. You don't need to delay investing any longer if you've learned the basics - but if you're still too new to the concept, then don't invest in any assets you don't understand.
Regardless, everyone should at least know what Bitcoin is and learn the basics before investing. You shouldn't invest simply because you're jealous of someone else who's already achieved returns - while you don't know what Bitcoin is. So, in short, basic knowledge is essential for any prospective investor.