What you do with your own time is up to you. It's a fools game trying to pass other peoples ever-changing purity tests. Personally I greatly enjoyed GPU mining for 2 years and grew my stack by doing so. I'd trade most alts for Bitcoin immediately and some I just left as lottery tickets. These days I don't mine anymore and about 3.5% of my "wealth" is shitcoins that I can't be arsed to sell. The rest is Bitcoin.

I will say I learned a lot GPU mining and I feel I can make much better arguments against Ethereum and multi-chain worlds than a lot of dogmatic Bitcoiners because I've experienced the pros and cons deeply myself, instead of relying on what someone else dogmatically told me. It was also a very fun hobby!