Sure, why not. Cryptocurrencies isn’t just limited to day-trading or being an investor. You can be a blockchain developer, and several others available.
We know cryptocurrency is not just limited to trading or an investor, but just few people know about other aspects of cryptocurrency which you just mentioned, just few people have those opportunities. The only thing most people know about is trading and investment, which I won't recommend anybody to depend on cryptocurrency trading as full time job, anything can happen at any moment so I believe their should be a back up plan, as a trader time will come when if you are not a professional, you won't be making enough money from cryptocurrency like the current moment which we are, so you should have other sources of income which will serve as backup.