I started to pay close attention to BTC 3 weeks ago and its price was about $7000. And up to now its price was $12500, reaching it's peak. Is it appropriate to invest in bitcoins from now on？ 
Its my nth time to read this kind of thread and im sure that you have found all the answers you need. Since profitability is good when it comes to bitcoin, on a personal note, yes it is not too late to invest on it.