A real believer believes that holding gives them better profit than day trading alone, the future of bitcoin looks nice and we have achieve success after success in the past year so that could be a good basis on why we should bet on the future of bitcoin.
I agree with you, anytime you can able to buy or invest bitcoin and hold it for a long-term and risk always in there, if you really a believer in bitcoin then you don't mind about the bad speculation that spreading on this forum or even in the social media. As long as you know about bitcoin and you really have big trust of it, anytime you can buy bitcoin. But if you can't afford to buy bitcoin now coz its price is really high, then wait for it to drop its price until you can afford to buy it.