If you don't have good knowledge about investment or if you don't have skill in this matter but you can't be very successful in investing
Bitcoin investment is not like other investment that you need to have a good knowledge on before you can start investing because you will be wasting the time that you are suppose use to be accumulating bitcoin and building your bitcoin portfolio. A new investor who wants to start his bitcoin investment only needs to know about the basic knowledge of bitcoin and after that he is to figure out how much from his discretionary income that he will use to buy bitcoin without stressing himself so that he can keep his regular DCA ongoing for 4-10 years and above.
Don't you as well think having that basic knowledge about Bitcoin before involvement is quite a good start up for a beginner? I once might have saw from this perspective but in a more relatable sense it is better off knowing as little as the basic aspect of Bitcoin which involves the process of purchasing and holding Bitcoin in a more safer space. Up till now some people are still being attacked and scammed off their portfolio on the sense of maybe starting up their investment process before learning about Bitcoin.
We might come to an agreement that it is likely more better learning about Bitcoin and avoiding further attacks instead of kicking on investing then get to experience something tragic, either by hack or whatever way possible, for someone who does not know how to protect their holdings will likely hold their investment in an exchange which is an easy option for scammers, also the exchange can as well be hacked and customers assets be stolen.
Skills as mentioned by @Litzki1990 is what is not necessarily required, Bitcoin involvement does not require those advanced knowledge before start up, anyone joining should just stick their very interest into the basic aspect and focus on accumulating, whatever skill in need of can be acquired in the long run.