Learning to trade is the most important thing, it doesn't have to be in class or have a mentor but just learn independently, especially now there is so much information that we can learn, the point is to learn. Because trading is not only difficult, but very very difficult. it takes years to learn technical analysis, risk and reward ratio, good money management, controlling emotions and greed.
I don’t agree that learning how to trade is extremely important. It’s an aspect to cryptocurrency investment and surely a way to build a portfolio but, it’s not the most important. You can do well in cryptocurrency even without having to trade I believe. Not so many in the field are traders and that’s mostly due to the high risk environment associated with trading live markets.
You could still be investing on the sidelines and be good, whatever goes for an individual I guess. In the end what’s most important is having to build your portfolio.
If an investor is going to build a portfolio then he must know about the investment strategies, the investment strategy should be if you invest weekly or monthly or every 15 days then it should be following the DCA method. Because if you don't have accumulated money and are a new investor then many people don't have that desire to invest with accumulated money, but if he invests little by little regularly then definitely the portfolio will be very big and can hold bitcoin for a long time. But in this case the ability to accept risk and stick with Bitcoin for a long time will be much easier for him if he follows the given procedure and holds Bitcoin.