I feel that there are no other ways to grow our BTC other than in the traditional ways, the first and main thing to grow our BTC is education and discipline. It is not only about investing money or cryptocurrencies, I also know about investing time in educating ourselves about the cryptocurrency market, analyzing trends and understanding Bitcoin as much as possible. The more knowledge the better and more prepared we will be to take advantage of opportunities and make strategic decisions.
investing time in educating ourselves on this subject opens the door to other ways to grow our BTC, as many colleagues mentioned before it is the classic and more "safe" one that consists of keeping your Bitcoins saved for a long term and over time with a little patience you could benefit from potential price increases, this is known in our community as "HODL". and on the other hand there are also loans, mining and others that are more risky than Trading... but always keep in mind that regardless of the option you take there will always be a risk.