I think it's a good news for all Bitcoin supporters. Well, 1,000,000 is just a number and to realize the real value of this achievement we have to compare it with other subreddits. I just checked and I can say all subreddits devoted to other cryptocurrencies are far behind regarding the number of subscribers. But this should come as no surprise, right? Right. What is surprising (in a good way) is that subreddit /r/The_Donald, the most popular subreddit dedicated to Donald Trump, has less subscribers than /r/Bitcoin/:
I think, we can call it an achievement. Congrats, /r/Bitcoin!
(No sarcasm intended. I really think that Bitcoin needs more attention from the public, because good things can only benefit from attention, and Bitcoin is a good thing.)