Because it is the most revolutionary invention since the start of mankind and being the early adopters will be set for life in near future. So yeah I think the best way to spend your time is learning about Bitcoin and earning them if you have a skill that could be monetized in this space.
Because bitcoin is the next big thing after internet maybe few people realized it now but soon enough all people will regret not having bitcoin when its the price is cheap still. Worldwide adoption is on going so time will tell when bitcoin will gets its true value. Spending time with bitcoin now is not a waste of time. We are investing in the future of the society or the world rather. All people spend so much time to bitcoin simply because they get profit from it or made a lot of fortune because of bitcoin.