Absolutely, Bitcoin knowledge is not complete without investing in Bitcoin.
Learning about bitcoin alone is already an investment because we don't do it for free. Those times we sacrifice, which could have been used for other things, were invested in learning about bitcoin, which I don't see as a wasted resource. I consider that time as something that was put to good use and could also be considered an investment.
If I don't have money to invest in bitcoin yet, that doesn't make my knowledge a waste. I can still continue to learn more about the currency until I can raise money to start my holding journey, but with the things that I'm able to learn about it, I can still use that knowledge to earn bitcoin without physically investing money in it, which is also one way that the information gotten from bitcoin can be put to good use. There are a lot of ways to actually earn bitcoin; all one needs is to have the knowledge, which is a good starting point, and capital to buy and start holding, which is what follows.
Learning gives you some sort of understanding about bitcoin and how it had changed over time. To know the real thing happening it is a must to experiment and through the experience we'll understand better about it. When we invest, we'll understand what we heard and what really happens. There are users who heard of the negative about bitcoin and stay away from it. Maybe if they had used it, this could've helped them realise it better.
Some used to exaggerate things to make people prioritise it. While using we'll know what is the reality and we'll get better understanding to take decisions than finding solutions through third person. When we see things happening good it keeps us on the positive side and increase the interest to spend more time as well as increase the investment.